1967 Buick GS 400 , Head Info

[Pennabuick]

Gentleman, I have a 67' Buick GS 400 with a cracked head (my heads casting # 1377979). I saw a pair of heads advertised as 400-430 Rare large port heads. Casting # 1382985.

Will they fit my 400 motor? I have never heard of "large Port" heads for 400-430, I would appreciate any info.

Thanks,
Lee

[Dr. Frankenbuick]

Some 68 and 69 big block Buick head castings had larger ports internal to the head. They will fit your engine, but are prone to cracking. You want to make sure they have been checked for cracks before buying.