70 W 30 rebuild

[83hurstguy]

The challenge of the roller cam in an Olds is the 5/16" rocker arm bolts. There are two basic options... the first is drilling the expensive/rare heads for a 3/8" or 7/16" stud and adding guide plates. Option 2 is the Harland Sharp 5/16" bolt-on mini-shaft rockers, which are around $450, and good to 350 lbs open spring pressure.

With roller rockers, you'll have to modify/remove the stock valve cover baffles or double up gaskets. Ram Air Restoration makes a 0.200" thick hard rubber gasket that's a nice piece. The stud mount rockers may clear with a short poly lock, but the mini-shaft ones hit the baffles at max. valve lift... went through figuring that out on my old '83 the hard way.

No doubt a roller is the way to go, other than those pesky Pure Stock rules. I'm stuck with the flat tappet for mine.