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Re: 1959 361ci. swap to 383
[Re: TJP]
#2947130
07/25/21 09:03 PM
07/25/21 09:03 PM
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Joined: Aug 2003
Posts: 43,115
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,115
Bend,OR USA
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I am not 100 percent sure but I believe there is a difference at the cranks rear flange. You are correct sir. The mating of the engine and trans prior to 1962 is completely different than 62 and later. Also different is the trans, cables/ control, driveshaft flange emergency brake etc. They did almost a 100% redesign of all mechanicals in 62.   On both, been there done that more than once, use the later 727 and buy and use a decent floor shifter   If you do this complete swap you will need to change the driveshaft also, Mopar use the old ball and trunion type front U joints in the automatic cars until 1965, they switch them on the stick shift cars in 1966. 
Last edited by Cab_Burge; 07/26/21 04:53 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 1959 361ci. swap to 383
[Re: TJP]
#2947153
07/25/21 09:55 PM
07/25/21 09:55 PM
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Joined: Nov 2003
Posts: 10,228
Colleyville
3hundred
I Live Here
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I Live Here
Joined: Nov 2003
Posts: 10,228
Colleyville
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What about swapping the 361 crank in with a fresh polish, bearings and new rear main? Do the '68 heads and block have all the accessory mounting holes needed?
'68 Fury Convertible
'69 300 Convertible
'15 Durango 5.7 Hemi
'16 300 S Hemi
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Re: 1959 361ci. swap to 383
[Re: 3hundred]
#2947207
07/26/21 03:34 AM
07/26/21 03:34 AM
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Joined: Aug 2007
Posts: 6,095
Valencia, España
NachoRT74
master
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master
Joined: Aug 2007
Posts: 6,095
Valencia, España
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What about swapping the 361 crank in with a fresh polish, bearings and new rear main? Do the '68 heads and block have all the accessory mounting holes needed? I like this. As far 361 crank comes great is a nice solution if you wanna get a 383 into your 59. I guess you wanted to make a straight plug and play job without deal with engine dissasembling, but this would be a partial refreshing job on the 383. I think some other stuff will be needed like keep the old 361 water pump and miscellaneous parts ( pulley, brackets ) to be installed into the 383.
Last edited by NachoRT74; 07/26/21 03:35 AM.
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: 1959 361ci. swap to 383
[Re: 3hundred]
#2947330
07/26/21 01:18 PM
07/26/21 01:18 PM
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Joined: Aug 2003
Posts: 43,115
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,115
Bend,OR USA
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What about swapping the 361 crank in with a fresh polish, bearings and new rear main? Do the '68 heads and block have all the accessory mounting holes needed? OP, if you do this crank swap make sure and have it balanced to the 383 piston and rod weights 
Last edited by Cab_Burge; 07/26/21 01:19 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 1959 361ci. swap to 383
[Re: Cab_Burge]
#2947376
07/26/21 02:24 PM
07/26/21 02:24 PM
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Joined: Jan 2003
Posts: 1,883
Northern OH
rapom
OP
top fuel
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OP
top fuel
Joined: Jan 2003
Posts: 1,883
Northern OH
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Interesting options. I’m wondering if newer heads would work on the 361. I believe, the problem with the engine is with a valve in the head. Engine shakes bad at idle, but smoothes out at speed. Engine doesn’t burn any oil. Engine runs very quiet also, (no rod or lifter noises) There is gas in the clean oil. (Could be the fuel pump). Just noting what I observed when I first looked at the car. I’m supposed to pick up the 59 coronet this weekend and the guy selling it assured me it would be running smoothly, but I’m not holding my breath.
Last edited by rapom; 07/26/21 02:33 PM.
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Re: 1959 361ci. swap to 383
[Re: TJP]
#2947395
07/26/21 03:08 PM
07/26/21 03:08 PM
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Joined: Sep 2003
Posts: 19,336
north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,336
north of coder
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To The OP, Trust me when I say swap the engine and trans both or not at all. unfortunately, i may have to agree with this. looking through my myriad of FSMs, the 1960 plymouth manual shows an 8 bolt crank flange on the 361. with that being said, i don't know if if the bolt circle is the same diameter as the later 6 bolt 383. if it is, it may be possible to machine up an adapter to make the crank flange the same length as the 361, then modify the flex plate from an 8 bolt to a 6 bolt by slotting a couple of holes. however, i would have to see both cranks and be able to precisely measure the flanges and the bolt patterns to be even remotely certain this may be feasible.
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Re: 1959 361ci. swap to 383
[Re: rapom]
#2947439
07/26/21 04:49 PM
07/26/21 04:49 PM
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Joined: Aug 2003
Posts: 43,115
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,115
Bend,OR USA
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My first Mopar car was a 1959 Dodge Coronet with a 326 C.I. poly motor(one year only, Dodge used the 318 poly motors after 1959) and a Powerflyte 2 speed tranny.  I remember the other 1959 Dodges with BB in them were either "Royals or Custom Royals, not Coronets Is this a 2 barrel or 4 barrel motor? It should have four bolt valve covers with aluminum rocker arm shaft hold down if it is a pre 1964 361 motor I'm not sure when Mopar, all brands, stop using the 361 and 413 motors in the passenger cars 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 1959 361ci. swap to 383
[Re: moparx]
#2947449
07/26/21 05:20 PM
07/26/21 05:20 PM
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Joined: Aug 2007
Posts: 6,095
Valencia, España
NachoRT74
master
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master
Joined: Aug 2007
Posts: 6,095
Valencia, España
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To The OP, Trust me when I say swap the engine and trans both or not at all. unfortunately, i may have to agree with this. looking through my myriad of FSMs, the 1960 plymouth manual shows an 8 bolt crank flange on the 361. with that being said, i don't know if if the bolt circle is the same diameter as the later 6 bolt 383. if it is, it may be possible to machine up an adapter to make the crank flange the same length as the 361, then modify the flex plate from an 8 bolt to a 6 bolt by slotting a couple of holes. however, i would have to see both cranks and be able to precisely measure the flanges and the bolt patterns to be even remotely certain this may be feasible. but what about using the 361 crank into the 383 block as mentioned? won't the 383 block meet the 727 iron case ? and yes, 361 got open chambers BUT smaller valves too. Can't tell about piston height difference thought
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: 1959 361ci. swap to 383
[Re: Cab_Burge]
#2947451
07/26/21 05:23 PM
07/26/21 05:23 PM
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Joined: Aug 2007
Posts: 6,095
Valencia, España
NachoRT74
master
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master
Joined: Aug 2007
Posts: 6,095
Valencia, España
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I'm not sure when Mopar, all brands, stop using the 361 and 413 motors in the passenger cars pretty sure the 413 when the 440 was released and the 361 when the 383B... Maybe ? or wasn't the 426 wedge a replacement fro the 413, then the 440 the replacement for the 426 ? something like that LOL
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: 1959 361ci. swap to 383
[Re: NachoRT74]
#2947453
07/26/21 05:28 PM
07/26/21 05:28 PM
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Joined: Nov 2003
Posts: 10,228
Colleyville
3hundred
I Live Here
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I Live Here
Joined: Nov 2003
Posts: 10,228
Colleyville
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To The OP, Trust me when I say swap the engine and trans both or not at all. unfortunately, i may have to agree with this. looking through my myriad of FSMs, the 1960 plymouth manual shows an 8 bolt crank flange on the 361. with that being said, i don't know if if the bolt circle is the same diameter as the later 6 bolt 383. if it is, it may be possible to machine up an adapter to make the crank flange the same length as the 361, then modify the flex plate from an 8 bolt to a 6 bolt by slotting a couple of holes. however, i would have to see both cranks and be able to precisely measure the flanges and the bolt patterns to be even remotely certain this may be feasible. but what about using the 361 crank into the 383 block ? won't the 383 block meet the 727 iron case ? and yes, 361 got open chambers BUT smaller valves too. Can't tell about piston height difference thought They say it's an eight bolt flange on the 361 vs. 6 bolts for the 383. Seems like the 383 might already have a flex plate attached? I know nothing of the balance problems. IIRC, the closed chamber head engines have the piston lower in the bore vs. the later open chambers. So he's getting the 906 heads over whatever closed chamber heads he has now. If I was younger, I'd enjoy the challenge of getting it all figured out and have fun doing it, not these days though...
'68 Fury Convertible
'69 300 Convertible
'15 Durango 5.7 Hemi
'16 300 S Hemi
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