i have a 383 stroker its 40 over i am using cliamer pistons the heads are the camel hump heads just stock other then screw in studs, the cam is a comp cams with .490 lift both exh and int and the duration is 230 int and 236 exh, i believe that its the 274h its a dual plane intake and 600 carb for now, it also has headers. if someone could dyno that for me that would be nice