Quote Originally Posted by Gerald Streeks
I have a 90 350 shortblock that is a rebuild from Advance Auto Parts. It has inverted dome -23cc pistons. The heads that are on it are a set of 76cc heads from a 73 truck motor. I'm running stock felpro head gaskets. I was wondering if I should get some heads with smaller combustion chambers. I was thinking of running some 305 heads because I really don't turn the motor over 5000 rpm. I heard these heads are 58cc but they don't really flow very well over 5000. What are your thoughts?
.....Hi Gerald, I went to campbellenterprises.com & used there compression ratio calculator. With the -23 inverted dome pistons, .040 gasget, .0001 deck height & 76 cc heads your compression ratio is 7:68 to 1..... & With the 58 cc heads your compression ratio is 9:00 to 1..... Not sure of advatages/disadvatages on 305 heads on your application so others will have to answer..... zzz