Hi guys-
need some help and advise please

i recently built a 2 ltr 16v motor with high comp pistons - throttle bodies- head and cam job-

KW output on the front wheels was 145

i have just sold that motor and now building a 2 ltr 8v

what need help on is what piston can i use to get the compression up and to make good power

the head is gas flowed and ported and the cam is cut to 288 deg.

some help please

thanks