eddy heads and what rockers to use?

Cudaman51, if the pistons are .017 above the deck, you'll have to minus that from the gasket thickness to come up with the amount left over.
A .040 distance is a good safe amount and yet still retains a good quench distance.

Example;

.054 thick gasket (A Fel-Pro) - .017 piston out of the hole = .037, the distance from cylinder head to piston. Close, but not bad, excellent quench.

.054 - .017 = .037