Now that's an interesting question. Even though the 455 is a tall block maybe one of the members with Olds engine experience can shed light.
OLDS 455 in 79 firebird
I have a 1976 olds 455 in my 79 firebird, it was swapped before I bought it and am wondering if there are any headers that would work without modification. The exhaust work the guy before me did is appalling and I would like to do something about it.
1 - 6 of 6 Posts
While you are awaiting more feedback, here's a YouTube feature on Old's 455 swaps into 2nd Gen F-Bodies. If you read down into the comments, there's talk of using 68-76 Cutlass 455 headers and 403 engine mounts. I know this feature is old but maybe if you reach out to the author or some of the folks commenting, you might get some info from them if they're still monitoring the thread. You could always search for more 455 Old's swaps on YouTube. Good Luck!
While you are awaiting more feedback, here's a YouTube feature on Old's 455 swaps into 2nd Gen F-Bodies. If you read down into the comments, there's talk of using 68-76 Cutlass 455 headers and 403 engine mounts. I know this feature is old but maybe if you reach out to the author or some of the folks commenting, you might get some info from them if they're still monitoring the thread. You could always search for more 455 Old's swaps on YouTube. Good Luck!
Thank you for the help!
You are welcome. Please let everyone know how you solved your issue.
It will mount the same as a small block/403 but obviously has the taller and wider deck. Not mentioned but if you have a shaker you will need to work out some options that work, standard hood just keep low profile intake.
1 - 6 of 6 Posts
Firebird Nation
A forum community dedicated to Pontiac Firebird owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more!
Full Forum Listing
Top Contributors this Month
View All
donny dotson
78 Replies
Aus78Formula
58 Replies
sleepyhollowtaman
50 Replies
Recommended Communities
