Previous Thread
Next Thread
Print Thread
Page 2 of 2 1 2
Re: 318 To 360 Swap [Re: VL21] #3025798
03/20/22 04:13 PM
03/20/22 04:13 PM
Joined: Mar 2010
Posts: 989
Atlanta, GA
M
mgoblue9798 Offline
super stock
mgoblue9798  Offline
super stock
M

Joined: Mar 2010
Posts: 989
Atlanta, GA
Originally Posted by VL21
Originally Posted by elmor353
I have a 78 Aspen wagon with a 318 and I am swapping it out for a fresh 360. I remember that the 318 and the 340/360 had a different mount on one side.
I went on RockAuto's site and they are showing the same part numbers for both 318 and 360. What gives? Any input on this is greatly appreciated.


The 360 was a factory option, someone surely has the bracket, if originality is a factor. Me, I would space it.

Is the Rock auto part just the insert? That would make sense.

Sniper posted a pic of drilling out the air injection port. The first set of headers i installed on a set of these heads made me ponder, until I realized they were completely blocked with carbon, so I just ignored them, and as long after that I knew of the where abouts of that car, it never was a problem. (next owner liked the car so much he kept it until rust killed it).


All of the new type bolt through motor mounts on cars from about 73 on to late eighties have the oval bolt through mount isolators. This is what the parts stores sell as a motor mount. No brackets included. .

Re: 318 To 360 Swap [Re: mgoblue9798] #3025816
03/20/22 05:19 PM
03/20/22 05:19 PM
Joined: Jan 2021
Posts: 309
delhi,il
T
trw1982 Offline
enthusiast
trw1982  Offline
enthusiast
T

Joined: Jan 2021
Posts: 309
delhi,il
advance auto parts shows the complete mounts with the steel bracket . part numbers 2325 and 2326. can be bought for under 25.00 plus tax. they are the same part number for 318 and 360.

Re: 318 To 360 Swap [Re: trw1982] #3025835
03/20/22 06:35 PM
03/20/22 06:35 PM
Joined: Jan 2021
Posts: 309
delhi,il
T
trw1982 Offline
enthusiast
trw1982  Offline
enthusiast
T

Joined: Jan 2021
Posts: 309
delhi,il
after i looked at mounts at aap online, i got an email for 15% off. i called the store and was told that you get 25 % off if you come in, order parts and sign up for speed perks. i will go in tomorrow and order the mounts to put on shelf. here are pics of parts. sorry pics are sideways.

20220320_171037.jpg20220320_171053.jpg
Last edited by trw1982; 03/20/22 06:35 PM.
Re: 318 To 360 Swap [Re: mgoblue9798] #3025873
03/20/22 08:32 PM
03/20/22 08:32 PM
Joined: Jan 2003
Posts: 9,546
Freeport IL USA
poorboy Offline
master
poorboy  Offline
master

Joined: Jan 2003
Posts: 9,546
Freeport IL USA
Originally Posted by mgoblue9798
Originally Posted by larrymopar360
Originally Posted by elmor353
I've done several 360 swaps on late 60's and early 70's a-bodies. I had never done the swap on an f-body before. Will be running a 727 and already have the proper B+M flex plate. Will be using headers for the exhaust. I know the driveshaft will have to be shortened.
Was just curious as to why RockAuto was showing the same numbers for complete mount assemblies on both engines. Guess I will shim the new mount. Thanks guys.
Yes you'll have to shorten driveshaft. I've had several shortened on my M bodies. No local shops to balance them after shortening. The shop that shortened them insisted I did not have to have it balanced after shortening. I was skeptical but so far so good and I have not had a problem but I sure would prefer to have it re-balanced. I believe you'll need a different yoke as well. yoke on the 904 transmissions is smaller than the 727


I have had several drive shafts shortened without rebalancing. As long as the ends are clocked the same and the shaft is welded back up on the lathe while turning they have been fine with no ill effects. Bubba's booger welds would not work well though.


I've shortened lots and lots of driveshafts without a lathe, and without rebalancing them. They have been in dirt track cars, 10 second drag cars, heavy duty work trucks and street cars. Correctly clocking the yokes and making sure they are straight in the shaft tube solves the balance issues, as long as the shaft wasn't bent to start with and the shaft doesn't have a rubber mounted core inside that is in the way of the new yoke position. The yoke also has to be the correct size for the tube used, sometimes shortening the shaft will encounter a change the diameter from where the yoke originally fit and where it ends up on the shortened tube. I won't shorten those shafts.

Re: 318 To 360 Swap [Re: poorboy] #3025938
03/21/22 07:01 AM
03/21/22 07:01 AM
Joined: Jan 2003
Posts: 13,175
md
M
mopars4ever Offline
I Live Here
mopars4ever  Offline
I Live Here
M

Joined: Jan 2003
Posts: 13,175
md
If you want the correct mount you can find NOS ones on ebay at times. Or as said just use the one Rock auto sells and use a shim/spacer/ washers.

Re: 318 To 360 Swap [Re: mopars4ever] #3026102
03/21/22 04:01 PM
03/21/22 04:01 PM
Joined: Jun 2013
Posts: 847
Keizer, Oregon U.S.A.
E
elmor353 Offline OP
super stock
elmor353  Offline OP
super stock
E

Joined: Jun 2013
Posts: 847
Keizer, Oregon U.S.A.
I will just use spacers on the mounts. As for driveshaft shortening, we have a very good shop in town that can shorten and balance it. I have used them before and been very pleased with their work. I am totally aware of the air injector holes under the exhaust ports. Discovered how to deal with them 35 years ago, when I had a nasty leak after swapping manifolds for headers.

Re: 318 To 360 Swap [Re: poorboy] #3026531
03/22/22 07:06 PM
03/22/22 07:06 PM
Joined: Jan 2011
Posts: 12,670
Central Florida
larrymopar360 Offline
I'm tired...Very tired.
larrymopar360  Offline
I'm tired...Very tired.

Joined: Jan 2011
Posts: 12,670
Central Florida
Originally Posted by poorboy
Originally Posted by mgoblue9798
Originally Posted by larrymopar360
Originally Posted by elmor353
I've done several 360 swaps on late 60's and early 70's a-bodies. I had never done the swap on an f-body before. Will be running a 727 and already have the proper B+M flex plate. Will be using headers for the exhaust. I know the driveshaft will have to be shortened.
Was just curious as to why RockAuto was showing the same numbers for complete mount assemblies on both engines. Guess I will shim the new mount. Thanks guys.
Yes you'll have to shorten driveshaft. I've had several shortened on my M bodies. No local shops to balance them after shortening. The shop that shortened them insisted I did not have to have it balanced after shortening. I was skeptical but so far so good and I have not had a problem but I sure would prefer to have it re-balanced. I believe you'll need a different yoke as well. yoke on the 904 transmissions is smaller than the 727


I have had several drive shafts shortened without rebalancing. As long as the ends are clocked the same and the shaft is welded back up on the lathe while turning they have been fine with no ill effects. Bubba's booger welds would not work well though.


I've shortened lots and lots of driveshafts without a lathe, and without rebalancing them. They have been in dirt track cars, 10 second drag cars, heavy duty work trucks and street cars. Correctly clocking the yokes and making sure they are straight in the shaft tube solves the balance issues, as long as the shaft wasn't bent to start with and the shaft doesn't have a rubber mounted core inside that is in the way of the new yoke position. The yoke also has to be the correct size for the tube used, sometimes shortening the shaft will encounter a change the diameter from where the yoke originally fit and where it ends up on the shortened tube. I won't shorten those shafts.
up


Facts are stubborn things.
Re: 318 To 360 Swap [Re: larrymopar360] #3026554
03/22/22 08:09 PM
03/22/22 08:09 PM
Joined: Jan 2003
Posts: 3,946
Canada -- Posts: 4034 -Registe...
5
5thAve Offline
Doesn't care what this says anyway
5thAve  Offline
Doesn't care what this says anyway
5

Joined: Jan 2003
Posts: 3,946
Canada -- Posts: 4034 -Registe...
Aftermarket got cheap and doesn't want to do two different mounts. When I had to replace my mount years ago they were still selling them with two different part numbers but it was the same 318 part in all the boxes.

Re: 318 To 360 Swap [Re: 5thAve] #3026735
03/23/22 11:43 AM
03/23/22 11:43 AM
Joined: Jan 2011
Posts: 12,670
Central Florida
larrymopar360 Offline
I'm tired...Very tired.
larrymopar360  Offline
I'm tired...Very tired.

Joined: Jan 2011
Posts: 12,670
Central Florida
Originally Posted by 5thAve
Aftermarket got cheap and doesn't want to do two different mounts. When I had to replace my mount years ago they were still selling them with two different part numbers but it was the same 318 part in all the boxes.
Figures. Reminds me of heater cores that don't fit in M bodies despite the aftermarket saying they do.


Facts are stubborn things.
Page 2 of 2 1 2






Powered by UBB.threads™ PHP Forum Software 7.7.1