K.I.S.S.

"Keep It Stupid Simple"

Stay out of the weeds here. Using the KB 162s with a 75cc E-Street, and zero decking the block, you will have approximately 9.7:1 CR.

A hydraulic roller would be nice, but a Lunati 10230703 flat tappet, a 1.6 roller rocker, and a RPM manifold makes a nice package. Even with cheap headers and a 750, your up about 100 hp over a factory HP 383. That's more than the soggy chassis will ever be able to use, and for relatively very little dough.

Make sure you follow KBs directions for ring gap, and keep the total timing at 34 or below to start. Proper distributor tuning/curving will make a huge difference in overall performance.

Can't get much simpler than that. Everything else is standard rebuilding procedures with quality parts and machining.