Sure thing. First, take the engine apart step by step and list every part that’s worn. Don’t skip the valves, piston rings, or the cam. Clean everything with a good degreaser—old grime hides a lot of damage. Then test each piece: a compression test for the pistons, a leak check for the cylinder head. Where you find a worn cam or piston, get an exact replacement that matches the original specs; don’t go modern and change the feel. Re‑grease all the bearings with a high‑temperature oil that matches the original’s viscosity. While you’re at it, replace any cracked or warped cylinder liners with the same material and size you had before. Finish up by re‑balancing the crankshaft and tightening all bolts to the proper torque. Finally, run it over a dynamometer to make sure the power stays in line with a 1970s Harley’s character. Stick to the specs and keep the soul intact, no shortcuts.

Got it, I'll log every bolt torque and part number so we can backtrack if needed. Good luck to both of us.