EFI Head Volume

[Shannen Durphey]

Mark Romans wrote:
> 
> I have a friend who has an 89 Firebird 5.7 w/tpi and a Vortech and he has
> the stock cast iron heads.  (No casting #) and we are trying to determine
> what the stock head combustion chamber volume is.  He wants to go to
> aluminum heads and drop his compression to 8.0-8.5 to one range.  Anyone
> know what the stock cast iron L98 F-Body app combustion chamber CC's are?
> Thanks.  Mark
63-64 cc, if they're the same ones used on pickups.  Drop
compression?  What is his current compression ratio?
Shannen