Use 4.10’s as 4.88’s to be effective would like a lot of cam for a lot of rpm. McCloud clutch. Late year ‘79 Cordoba disc brakes.
Use the above parts. Gasket thickness as needed. You may not need to run to the thin head gasket off the bat.
Dumb move, properly ported head. Use the ones on the engine now.
To broad or a statement and probably it a good idea with the below parts and cylinder heads you have or described.
Bad idea, go with a rpm to 6000 or so.
You and your build sound like a crazy man running naked down main street in Manhattan in the snow covered in multi colored jello waving & clutching daisy flowers in one hand and a bottle of hallucinogenic drugs in a vial in the other.