Mild Built 340 Timing/tuning help?

PyePerformance said

I tested cold compression after we built the engine. All 8 were between 140-148psi.

I tested warm compression just now, (all plugs removed,) cylinders reading between 130-138psi (hopefully not cause for concern!)

Click to expand...

At those cranking pressures I'd bet that thing would run on the cheapest gas you can find.

For reference, my 9.6:1 (measured) 340 cranks 170 psi w/ 230* @.050" camshaft. I run 24* initial and 34 total. It runs great on 91 with no detonation.

I'd give it as much initial timing as it wants - provided it doesn't buck the starter when warmed up.