72 Olds 455 swap into 75 F-Bird?

[FIREburd24]

will the big block bolt patern be the same as the firebirds? also, will the new tranny (Which im not sure what it is... whatever comes with the 455 ???) be able to run the the firebird??? thanx

[volkerc]

Originally Posted by FIREburd24

will the big block bolt patern be the same as the firebirds? also, will the new tranny (Which im not sure what it is... whatever comes with the 455 ???) be able to run the the firebird??? thanx

yes

[FIREburd24]

thanx, but your positive even the current tranny in the olds will fit like it was meant to be in there?

[tuske427]

Originally Posted by FIREburd24

thanx, but your positive even the current tranny in the olds will fit like it was meant to be in there?

Hi:

Unless I overlooked something, please help to provide more info.

what engine/ trans does the Firebird currently have?

As for the Olds 455- I will assume it has a th400 behind it (if I'm wrong, please advise)

As for your swap, the Olds and trans will bolt in, but it is possible you may need different motor mounts, and a different crossmember, and a different driveshaft all depending on what is in the car currently.

Buicks, Olds, and Pontiacs have what's known as a "BOP" bolt pattern. It is different form the chevrolets. This is why many of these parts will interchange.

But if you have a th350 trans in the firebird now, it is a different size transmission than the th400 and this is why the crossmember will need changing ,as well as the driveshaft. However, all of these parts should be readily available at a local junkyard, or on ebay.

Much of the wiring, etc should easily adapt.

I hope this is helpful.