[Hotrodjohn71]

Hey fellas
I have a fairly fresh, bone stock 326 (1965) with what i believe to be the stock D-port heads. All stock and Rochester 2-jet carb.

Currently i have about 39-40° total timing (19 init + 20 mechanical from an HEI distributor (the only non-stock part on the engine).

It always starts up great, hot or cold. No labor to the starter. And there is no pinging weather it be going 70mph down the road, mashing the throttle or going up a long steep hill. (I buy the highest octane gas at the pump). It really runs like a bat outta he\\, and seems to like that timing.

Im asking about this issue because ive been reading in other threads that dammage has been found on main bearings from too much total advance where no pinging was heard. It was said that clear signs of detonation damage were found on the rod bearings.

I do not want to be doing damage to my bearings.
Thoughts?