PAT thanks i wasnt shure what the differnce was between them and ill use a markIV cam then as for cam ide never use a hyrd roller cam only a solid roller i didnt look specs up but around 270 int 280ex at.50th it was right around 700 lift it was around 4 to7600 rpm range for use maybe the strip once just to see what itll do if it hooks up but mainly pleasure on the street not a daily driver roll cage no heater back seat is all tubs 488 gear in a nova i dont mind pullen lifters every winter to inspect or replace them i just dont want to worry about them thought maybe those isky ones were the answer