I am putting together a 103" and I am looking for any info on gains or losses between 10.5 vs 11.0 pistons. I will be using MVA heads.

 

what cams? match the compression to what the cams call for.if your using cams that like 11.0-1 and you run 10.5-1 it`ll be soft,if you try to squeeze a cam set that's likes 10.5-1 and you set yhen at 11.0-1,detination & heat probs will occur