301 to 455

[SlinkyBMX]

Just getting everything I need ready so it wont take forever from missing parts.

What will I need to swap these out and have the 455 bolt in nicely?

Also, I have a TH400 Chevy transmission. By any chance will that fit on the 455.

Thanks for the help!
Lars

[SlinkyBMX]

Just getting everything I need ready so it wont take forever from missing parts.

What will I need to swap these out and have the 455 bolt in nicely?

Also, I have a TH400 Chevy transmission. By any chance will that fit on the 455.

Thanks for the help!
Lars

[Jeff Walker]

The motor mounts are the same, so that part of the swap is a drop in. Do you have any of the brackets from the 455. Some of the 301 bracket for the accesorys are different than the 455 due to the lower deck height of the 301. I don't remember which ones for sure though. It's been a long time since I have worked on this kind of swap.

No the Chevy TH400 case will not fit behind the 455. What kind of transmission is in your car now?

[Jeff Walker]

BTW you might get better info if you repost this in the Pontiac Drivetrain-Street catagory.

Oh, and welcome to the PY forum. You can find a wealth of Pontiac info heare.