1970 350 to 455

[crazybuick]

sorry ok im redoing my 70 skylark .i took out the 350 .im droping in a 455 .when i put the frame mount in they are off center the right frame mount sits on the edge of the frame while the left side hangs over the edge of the frame about an inch or so wandering if its normal one a buick.to have the frame mounts like that and im using the factory drilled holes for the big block to go in

[WildKitty]

I think it is TAPerformance that has the adapter motor mounts for what you are doing. I was WAS going to drop a 455 into my 64 LeSabre vs the 300, but I changed my minddue to the $ of gas, and I want to drive about 5,000 miles before I give it to my daughter. I'd be in the poor house with the 455 + she would probably never drive it. I'm refreshing the 300, and see if it will do the 5,000 before i think about another engine.
Butch
64 Wildcat 445
64 Lesabre 300
Skylark 455 - on engine stand (trailer)

[bob k. mando]

when i put the frame mount in they are off center the right frame mount sits on the edge of the frame while the left side hangs over the edge of the frame about an inch or so


what do you mean when you say "put the frame mount in"? are you bolting them up to the engine mounts to see where the engine wants to sit when it's bolted up to the trans?

if this is what you're up too don't forget, the big block has THREE holes on each side of the block. if you're using the front pair of holes, that would push the mounts too far forward in relation to the trans. use the rear pair of holes on each side and it will probably be good.

using the front holes puts the engine closer to the firewall and gives you better weight balance for handling purposes but you'd probably have to jigger with the trans cross member and some of the linkages to get everything slid back. and a spacer+longer bolts for the fan.

[carmantx]

Yes, it will hang over, and looks kind of wrong, but not.

I think that's what you asked.

Look at buickperformance article on the sway. It will show what holes in frame to use.

[crazybuick]

yes the motor frame mounts that i will be using are the factory drilled hole towards the front of the car .its the only holes that will line up with the ta mount .the rear hole do not line up .that is where the 350 was sitting in .im going to drop it in see what happens but im sure mabey that it will line up i have a new jegs trans bop going in the front end is totaly redone every bushing.every arm tie rod this car was 40years of doing nothing to it .im not very puter literate so any links sent to me will be put to good use .if i ever figure out how to use this ill post a picture thanks every body for ur help .

[crazybuick]

yes i have the motor mounts on the motor in the 2 back holes on the block

[josrocket]

Im not quite understanding...Im doing this same thing...Im putting 455 in a 350 skylark. I have the original engine mounts and brackets form the junked GS 455 it came out of...will it bolt up in my skylark

[carmantx]

if the car is set up for a 350, then you need to use the 455 frame mounts, which are located in a different position than the 350 mounts.

[crazybuick]

gsx can you direct jo or puy up the pictures you did for me that will show him or her sorry i dont no how they look in there

[carmantx]

Here you go Jo

http://www.buickperformance.com/conversi.htm