[Gaz64]

I would think about a full engine rebuild if a camshaft change was part of the recipe, especially if a roller cam is a choice.

There are too many variables of minimum clearance to consider, and they all have to checked as part of the dummy build process.

Coil bind, retainer to seal, rocker to rocker stud, pushrod length, rocker geometry, connecting rods to camshaft,
valve to piston clearance at 10 BTDC and 10 ATDC as well as TDC, valve cover clearance.

All engines are a bit different, and so the clearance you have on yours now needs to be accurately measured first.

Gary