Are there different head casting numbers

[86bluet]

Merry Christmas everyone hope Santa brought you Buick parts, I Was wondering if there were different casting numbers on the 3.8L heads and if so what # is the better one Have 86 heads but have access to 87 heads to do mild work on

Thanks ahead of time

 

[Squid4life]

Most of the time they are 8445 heads on 86 and 87. If they are different, they will be older, maybe not as good. 193 castings I think are pretty close, as long as they have the "bridged" water coolant passage.

 

[turbofabricator]

All RWD Buick V6 heads manufactured after 1984 are 8445 castings. The 6293 casting is the same, and is also the casting number on StageI heads. The StageI heads have a smaller openings in the end water ports (even smaller than the 8445 heads) The 6293 StageI heads also are not drilled for EGR.

 

[Otto J]

All these castings if ported correctly will flow the same.