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Poly 318 year interchangeability #1474681
07/27/13 12:10 AM
07/27/13 12:10 AM
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woodcrest, CA
magnum440d100 Offline OP
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Picked up a poly 318 out of a 1967 coronet(?). That's what my friend said.

So now I have the motor. What vehicles does it fit? When did they stop the front engine mount deal?

Last question. Will this poly fit in a 59 coronet? Or does the 59 have the front mount?

7791740-image.jpg (8790 downloads)
Re: Poly 318 year interchangeability [Re: magnum440d100] #1474682
07/27/13 12:20 AM
07/27/13 12:20 AM
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NEW JERSEY
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If it's a poly motor it's not a 67

Re: Poly 318 year interchangeability [Re: dynamite] #1474683
07/27/13 12:27 AM
07/27/13 12:27 AM
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Upstate, NY
sixpack4spd Offline
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I've got a 67 Belvedere parts car with a poly 318 in it. Everything looks original. From what I've read they sold the poly motor in Canadian cars in 67.

Re: Poly 318 year interchangeability [Re: dynamite] #1474684
07/27/13 12:28 AM
07/27/13 12:28 AM
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Newfoundland Canada
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Quote:

If it's a poly motor it's not a 67





Canadian built cars had the poly in '67 so it could be a '67 engine.

Re: Poly 318 year interchangeability [Re: Mopar1] #1474685
07/27/13 01:05 AM
07/27/13 01:05 AM
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woodcrest, CA
magnum440d100 Offline OP
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Quote:

Quote:

If it's a poly motor it's not a 67





Canadian built cars had the poly in '67 so it could be a '67 engine.




So where do I find numbers on this block? How do I identify it?

Re: Poly 318 year interchangeability [Re: magnum440d100] #1474686
07/27/13 06:42 AM
07/27/13 06:42 AM
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Niles , Ohio
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therocks Offline
oh wait.but hey.lets see.oh yeah.
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I agree it could be a 67.We bought a 67 Fury that was sold locally.It was all OE and had a poly motor.Needed a timing chain so we got it for 75 bucks.Rocky


Chrysler Firepower
Re: Poly 318 year interchangeability [Re: magnum440d100] #1474687
07/27/13 10:07 AM
07/27/13 10:07 AM

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Quote:

Picked up a poly 318 out of a 1967 coronet(?). That's what my friend said.

So now I have the motor. What vehicles does it fit? When did they stop the front engine mount deal?

Last question. Will this poly fit in a 59 coronet? Or does the 59 have the front mount?




I don't believe any Mopar V-8's used the front mount, only the flatheads, and I'm not sure they still were by 1959. At any rate, the early poly 318 blocks used cast-in ears on each side of the block. The earliest poly mounts were different, but by 1959, the V-8 mounts for A and B V-8's were a cup that bolted with a bracket to each side of the block that fit over a rubber solid tube looking thing that bolted to the front crossmember. The rubber part was not physically bolted to the block in any way; the weight of the motor and the angle of the cup/rubber kept it together. Sounds weird, but apparently it worked.

I'm sure you could rig up brackets to use the later mounts, but if you could find the early cup-style motor mount brackets, they will bolt up to a later 318, and the rubber biscuits are still available. With them, you could bolt in a later poly 318 to a 59 chassis.

Transmission is a different matter. A 59 poly 318 transmission won't bolt up to a 62 or later poly 318. Besides the extended crank flange issue, the bolt pattern on the back of the block is different. You can use a later transmission with the later motor, but you'll have to fabricate a trans mount. If you use a later pushbutton trans, the 59 pushbuttons will work if you use a later cable, assuming your 59 was originally a Torqueflite, not a Powerflite.

Here's a pic of the back side of a pre-62 poly 318:

Re: Poly 318 year interchangeability #1474688
07/27/13 10:08 AM
07/27/13 10:08 AM

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And here's the back side of a 62-later poly 318:

Re: Poly 318 year interchangeability #1474689
07/27/13 10:12 AM
07/27/13 10:12 AM

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And the explanation of the difference I got online:

Quote:

The top four holes [of the 61-earlier] will line up but the bottom two holes on either side of the block, along with the dowel locating pins are different than the 62-66 Poly 318 engines and all LA engines.

Third, the starter location on all the aforementioned Poly engines is different, positioned approx.between four and five o' clock vs. the 62-66 Poly 318 engines and all LA engines. The 62-66 Poly 318 enignes and all LA engines starter location is closer to the block; approx. the five o' clock postion.



Re: Poly 318 year interchangeability #1474690
07/27/13 10:31 AM
07/27/13 10:31 AM
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Des Moines IA
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My job keeps getting in the way of me replying but the guy who posted above me mentioned some of what I was going to say.

Medium duty trucks did use the front mounts so perhaps it is a truck engine.

The date of manufacture of the block is probably cast on the passenger side below the exhaust manifold.

As mentioned above, the transmission in the 59 and year of the engine will determine if this can easily be used in the car.


1970 Dodge d100/eventually going on a 77 D100 frame
Re: Poly 318 year interchangeability [Re: Soopernaut] #1474691
07/27/13 11:39 AM
07/27/13 11:39 AM

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Here's what the rubber part of the 57-9 V-8 motor mounts look like. They are the same, B or A, I believe.

The metal cup bracket that bolts to the engine would of course be different for B vs. A motors.

7792101-motormounts.JPG (477 downloads)
Re: Poly 318 year interchangeability #1474692
07/28/13 03:00 AM
07/28/13 03:00 AM
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levittown pa
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u can ask under the street rod section of this forum,, or yahoo has a poly group that has a ton of guys that live and breath this motor,,


1966 barracuda prostreeter super charged 340(SOLD)
1940 dodge coupe 241 hemi street rod
2014 ram express hemi 4x4 dailey driver
2015 cherokee
2013 R/T classic
Re: Poly 318 year interchangeability [Re: fstfish66] #1474693
07/28/13 10:18 AM
07/28/13 10:18 AM
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SoCal
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A good friend of mine has one in a 67 Valiant,it's a fun car!

I would suggest you contact Gary Pavlovich in regards to poly questions, he is the poly guy for sure.

Send me a pm and I will furnish his contact information.

Joey

Re: Poly 318 year interchangeability [Re: magnum440d100] #1474694
07/28/13 11:53 PM
07/28/13 11:53 PM
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Bend,OR USA
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Quote:

Picked up a poly 318 out of a 1967 coronet(?). That's what my friend said.

So now I have the motor. What vehicles does it fit? When did they stop the front engine mount deal?

Last question. Will this poly fit in a 59 coronet? Or does the 59 have the front mount?


The crankshaft flange length and converter are different from 1962 and later than the pre 1962 cars. I had a 1959 Coronet, it had a 326 C.I. motor (one year only ) that was identicle to the same year 318 in the Plymouths, my Dodge had a two speed Powerflyte trans in it If you want to use that motor in that car plan on using a later moddle 727 or 904 automatic instead of the early cast iron case Torkflyte or Powerflyte trans


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Poly 318 year interchangeability [Re: Cab_Burge] #1474695
07/29/13 01:51 AM
07/29/13 01:51 AM
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woodcrest, CA
magnum440d100 Offline OP
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Quote:

Quote:

Picked up a poly 318 out of a 1967 coronet(?). That's what my friend said.

So now I have the motor. What vehicles does it fit? When did they stop the front engine mount deal?

Last question. Will this poly fit in a 59 coronet? Or does the 59 have the front mount?


The crankshaft flange length and converter are different from 1962 and later than the pre 1962 cars. I had a 1959 Coronet, it had a 326 C.I. motor (one year only ) that was identicle to the same year 318 in the Plymouths, my Dodge had a two speed Powerflyte trans in it If you want to use that motor in that car plan on using a later moddle 727 or 904 automatic instead of the early cast iron case Torkflyte or Powerflyte trans




I had a 59 coronet with the 326. People kept saying it was a poly 318. It had the pushbutton trans though.

I was asking because it would be nice to get back into a 59 coronet. I LOVED that car

Re: Poly 318 year interchangeability [Re: magnum440d100] #1474696
07/29/13 03:05 AM
07/29/13 03:05 AM
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Bend,OR USA
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1956 to 1964 Mopars had pushbutton shifters except the later cars that came with console shifters. The Powerflyte was the only automatic trans for the 1956, Chrysler and Imperials included !957 was the first year of the 727, cast iron case and a seperate bell housing I'm not sure what year was the last one for the Powerflyte tranny to be used in, maybe 1959 My 1959 Coronet had a the stock pushbutton shifter for the two speed Powerflyte, D,L,N and R not in that order though


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Poly 318 year interchangeability [Re: Cab_Burge] #1474697
07/29/13 04:57 PM
07/29/13 04:57 PM

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I must be on a bunch of "ignore this user" lists, because it seems like every time I post, someone else will the post the same info later.

I own a 59 Coronet. Was originally a 326/Powerflite, now a 1964 Chrysler 413 with a 62 Chrysler Torqueflite worked by a 59 Dodge Torqueflite pushbutton setup and a 63 Chrysler shift cable. Have factory 1959 Chrysler motor mounts/brackets up front, and the original 59 Dodge trans crossmember with a 64 dodge trans mount extension welded to it that holds a 64 Dodge trans mount. E body 8 3/4 rear.

The 62 Chrysler trans has a parking brake drum setup on the back of the trans like the 61-earlier trannies did, but I had to use a 56 Plymouth backing plate for the 59 park cable to work on the 62 park brake.

I thought my experience with my own 59 Dodge as well as my 56 Plymouth with a 277 poly and Powerflite would give me some insight into the OP's question, but maybe not.

Carry on.

PS: 1961 was last year for Powerflite.

7794602-59Coronet-1.jpg (466 downloads)
Re: Poly 318 year interchangeability #1474698
07/29/13 06:13 PM
07/29/13 06:13 PM
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woodcrest, CA
magnum440d100 Offline OP
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Quote:

I must be on a bunch of "ignore this user" lists, because it seems like every time I post, someone else will the post the same info later.

I own a 59 Coronet. Was originally a 326/Powerflite, now a 1964 Chrysler 413 with a 62 Chrysler Torqueflite worked by a 59 Dodge Torqueflite pushbutton setup and a 63 Chrysler shift cable. Have factory 1959 Chrysler motor mounts/brackets up front, and the original 59 Dodge trans crossmember with a 64 dodge trans mount extension welded to it that holds a 64 Dodge trans mount. E body 8 3/4 rear.

The 62 Chrysler trans has a parking brake drum setup on the back of the trans like the 61-earlier trannies did, but I had to use a 56 Plymouth backing plate for the 59 park cable to work on the 62 park brake.

I thought my experience with my own 59 Dodge as well as my 56 Plymouth with a 277 poly and Powerflite would give me some insight into the OP's question, but maybe not.

Carry on.

PS: 1961 was last year for Powerflite.




Not on my ignore user list

I'm on my phone, so pictures don't always load. I have to reload a few times to see all the pics.

Thanks for the pics of the blocks and mounts and especially your coronet

Mine was a 4 door hardtop. After getting the 56 buick, it only makes me want a 59 coronet more. Just hoping I had a motor I could have used so I can find a body.

Thanks 413coronet

Re: Poly 318 year interchangeability #1474699
07/29/13 07:21 PM
07/29/13 07:21 PM
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I saw several 1959 Dodge Custom Royale( I think that is the correct name, maybe Lancer Royales, CRS ) while I was in the Army in 1967, they almost made me want to get one of them and put a 413 in it. I sold my Coronet before getting drafted, I later swapped a Chrsyler 1955 331 Hemi motor into it hooked to Powerflyte, it didn't fit very well with the stock rear sump oil pan I ended up buying it back after getting out of the Army and put a 1958 Chrysler 392 Hemi in it with a 3 speed O.D. stick shift trans and floor shifter, that swap really rock out Lots of things gone by since then

Last edited by Cab_Burge; 07/29/13 07:23 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)






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