1968 Buick Riviera Modded

[Crypticash]

I purchased a '68 Buick Riviera 2 door hardtop.

Transmission was rebuilt.
Engine, a 430, also had to be rebuilt - broken connecting rod damaged the crankshaft which was replaced.
Heads were also crack - ended up having to put in 455 heads (all I could find) using the original 430 seals. I am now having to replace the intake
manifold due to the 430 intake not being able to seal the larger port holes on the 455.

Will a 1970 Buick 455 4bbl intake manifold GS fit on my '68?

Any help would be greatly appreciated.

[bob k. mando]

the Buick 400ci, 430ci and 455ci are all nominally the same except for bore diameter. although, obviously there are emissions changes over the years.

one common problem for guys putting 455 heads on 430 blocks ( and vice versa ) is the circular vs double scallop coolant passages.

http://www.buickperformanceclub.com/idblock.htm

455 and 430 also used different dia push rods, so you ought to be careful about your rockers.

http://www.1badriv.com/

www.TAPerformance.com is the major Buick supplier and is thoroughly versed in all of the intricacies of swapping parts between various generations of the BBB.

as to your specific question, yes, the 455 intake should work on the 455 heads.