iv'e sent my specs to comp and lunati no replys so i'll ask those here,combo is 500" indy 440-1 otb 12to1 comp,indy single plane 4150 flange,4500 stall power-gide,4.56 gear,14x32 m/ts,3000lbs race wt,would like to stay around 7200 max rpm,1.5 rockers.this is a foot-brake car.thanks,sam.i have 1000cfm hp or 1050 dom for carbs. forgot looking at solid flat tappet.