455 dual exhaust headers that are small for clearance?
#1
455 exhaust manifold and corssover pipe matchup help?
Swapping a 455 in place of my 307 on my Cadillac Brougham, 1987.
(With trans and other)
I found on ebay there are factory 455 exhaust manifolds with the 3 bolt exhaust flange for single exhaust and can take a crossover pipe.
Do you know if I can buy those 455 manifolds and use the crossover from my olds 307's manifolds?
(With trans and other)
I found on ebay there are factory 455 exhaust manifolds with the 3 bolt exhaust flange for single exhaust and can take a crossover pipe.
Do you know if I can buy those 455 manifolds and use the crossover from my olds 307's manifolds?
Last edited by GHOSTOWLGRID; May 31st, 2016 at 02:33 PM.
#2
The SBO crossover will be too short for the 455 application.
There is a current discussion about the differences here:
https://classicoldsmobile.com/forums...over-pipe.html
There is a current discussion about the differences here:
https://classicoldsmobile.com/forums...over-pipe.html
Last edited by Fun71; May 31st, 2016 at 02:51 PM.
#3
Ok thanks. Would have been easier because I could have kept the single exhaust without much effort, but since I'd have to get a pipe made up, I might as well get a dual exhaust for not much more.
I have been looking at these for a dual exhaust, looks pretty good:
http://www.ebay.com/itm/Oldsmobile-C...hEn88w&vxp=mtr
Says 455 big block. I mostly just wanted to verify that it will for sure fit the 455 since I'm here.
I have been looking at these for a dual exhaust, looks pretty good:
http://www.ebay.com/itm/Oldsmobile-C...hEn88w&vxp=mtr
Says 455 big block. I mostly just wanted to verify that it will for sure fit the 455 since I'm here.
Last edited by GHOSTOWLGRID; May 31st, 2016 at 03:20 PM.
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