What springs come on eddy performer RPM heads

Hughes engines flow numbers (possibly a whole separate point of debate and contention?) show 236 intake 185 exhaust at the .450 lift figure. If you have the cam and are budgeting for a torque converter, it would work well enough. But your not going to get near the power level available with the heads that reach the sweet spot at .550 lift and above. With a probable 8.6:1-9:1 compression (MP .028-.031 thick head gaskets could help), using a cam that would optimize charge filling would make a noticeable difference.