I have an extra motor with a toasted bottom end but the top is fine. I figured since my race motor is a bone-yard piece it may be wise to rebuild at least the head of my spare motor. It will also let me get more comfortable with it since I have never rebuilt a motor before.

Can anyone help me with the folowing questions:

What can I do, legally, to improve performance? I know I can port match the exaust and plain the head. Not sure how much I can take off the head though. I plan on running the early higher compression pistons at some point.

What should I do at a bare minumum to freshen this piece up? What parts should always be replaced? Timing chain and guide, valve seals, etc?

I have a FSM and access to proper tools for measuring everything once I have it disassembled.

Thanks,
Corey