318 MAX fuel economy builds?

mgoblue9798 said

The magnum heads port window are a closer match to the regular performer intake size than the LA 318 or LA 360 heads. Both are in between the 318 and 360 size ports.

The stock magnum rockers are not adjustable, but adjustable ones are not terribly expensive since a/m chevy rockers will work by installing a screw in conversion rocker stud in the magnum head.

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I actually have a set of magnum heads but I gave the block to a friend and I already lined up a set of 920 heads for my project. I'll get them cleaned up and have the 11/32 guides installed and have my seats opened and nitrate treated. Then I'll get started implementing info from the book into my heads. My next thing is which size valves do I use? Will the chevy 1.84 intake valves fit? Then 1.60 exh?