[1badx]

I have a set of gm 18 degree heads that are 68 cc look like they have not been milled lots of room before intake seat how small can i get the ccs down to

 

[T-flow]

Hard to say. What casting? 363?
Some that I've seen are in 40's-50's


T-flow

 

[Chris Uratchko]

42-44...?

 

[WarnerRacingEngines]

yea i would say in the 40s