Chevycobb

I'm trying to find a set of stock heads to use(maybe port) but i keep coming across a few different casting numbers for lt1 aluminum heads...such as:

10207643 is for a 94-96 LT1
10128374 is for a 92-up LT1
10205245 is for a 93 LT1

what was really the differece between these? all of them are aluminum, all for LT1's, all have 175/68cc port volumes. Just trying to find a set of heads, and want to know what to look for...

Thanks!

Chevycobb

ttt

Chevycobb

surely someone can tell me if there is a difference???

Pasky

96-97 flow better as far as castings go, but dont have as much meat for porting.

94-95's flow less as castings but have the most potential for porting

92-93's im not sure.

WS Sick

The 93s have alot of meat as well.

Chevycobb

so basically if I want something that flows good stock i want some that came off a 96-97LT1, but if I want to port them anything thing else is best?

Pasky

Yes