Will exhaust manifolds from a 1966 Special 401 to my 1965 Skylark GS w/ a 425

[1971]

I have a 1965 Buick Skylark GS but has a 1966 Riviera 425 engine with headers.  I want to go back to the original stock exhaust manifolds.  Will the exhaust manifolds from a 1966 Buick Special with a 401 engine work on my 425?

[Brian]

A 66 buick special came with either a 300 or 340 V8, not a 401?  The only manifolds that will work are from a 65 or 66 Skylark GS with a 401.  The 401 and 425 heads are identical, so they will fit the 425 perfectly.  425 just has .125" larger bores in it.

[1971]

Brian,
   Thanks for the info.  A wrecking yard at French Lake, Mn, said they had a set out of a "1966 Special w/ a 401"??  I will call them again tomorrow.  I've been a Chevy Impala person for 40 years and this is the first Buick (1965 GS) for myself.  My wife loves the car (so guess who gets it).  I recently purchased the car and also just found this great website for info.  I know a little about this car cause I'm doing the work on it.  People like yourself are an absolute great resource for me.  Thanks again.
                                                                                                        Richard

[GS66]

1971, congrats on your Buick! Are you in Minn.?

[1971]

I moved from Alaska to Salem, Oregon about 9 months ago and purchased the 65 GS in Nov. 2014.
                                                                                                                                   Richard

[GranSportSedan]

I moved from Alaska to Salem, Oregon about 9 months ago and purchased the 65 GS in Nov. 2014.
                                                                                                                                   Richard

I am in Salem and am happy to give you info on all the local parts resources as well as Buick guys.  Bob

[1971]

Bob,
   Thanks, I'd appreciate any information regarding Buicks.
                                                                               Richard