It's easy, just make the exhaust stuff look like the intake stuff. I mean retainers, springs, etc. Comp 911s are pretty much standard for bigblocks, same as 901s for smallblocks. But it really depends on the camshaft.

If you're having work done on the heads, have the valve guides cut down to allow you more latitude on lift. It shouldn't cost very much.

Be sure you aren't going to have as much in those heads as a pair of new Stealths. I usually say don't spend a nickel on the old heads until you get a written quote. Costs add up quickly when redoing old heads, and I say that with 2 or 3 pairs of OE heads on the shelf back home that are becoming less and less valuable as time goes by.

Labor costs are high and specialized work takes $$$. Then when you are done, you have a set of 42-year-old heads with a lousy combustion chamber.

R.