You must check valve to piston clearance to make sure the valves don’t contact the piston as it travels through TDC on overlap.

The exhaust valves had plenty of room.

The cam timing marks looked like this when the cam timing was retarded 5°.

With cam timing retarded 5°, I checked the timing points (@ .050” valve lift) using a degree wheel and dial indicator.  I have no way to know what the optimum cam timing should be because this cam is designed for a completely different engine.  I felt 5° retarded from the factory timing mark was a good place to start on my engine, and the valve timing points seemed reasonable.  I wanted a late closing intake to mitigate my high cranking pressure (245 psi).  I’m hopin to get off the octane booster.

Intake opens: 15°BTC
Intake closes: 55°ABC
Exhaust opens: 48°BTC
Exhaust closes: 18°ATC

The new drilled-hole diverts oil into the bolt-hole and should fill this void adjacent to the rocker shaft.  Hopefully I don’t end up with leaks.

And I used a Dremel to grind a small oiling slot into the left hand thrust face of each rocker arm.  

I installed the RD valve springs with the stock retainers and cotters.  Massaged a liberal coating of assembly lube into each spring.