Hello I like the 509 cam ! They make it two ways one is more for racing and the other one is more for the street,I put them in all of my big block Mopar 440 and some 383.I like the Holley 850 DP or six pack set ups ,most all of my iron heads have 214 intake valves and 181 exhaust valves and I run 3" exhaust pipes all the way back with a crossover pipe.also stock HP manifolds.