Dwell at TDC?

Thanks, I kinda had the gut feeling that more dwell might increase the likelihood of detonation, but didn't know it as a fact.

So if I stroked it with a 7.100 rod(stock length is 6.951") with a chevy journal would you say the safe thing would be to ease back on the CR? On the other hand I'm wondering about keeping the stock stroke and bumping the CR to 10.5:1, which the hemi guys seem OK with for the street. Need custom pistons no matter what because there are no shelf forged pistons for a .060" overbore, which I'm stuck with.

Thanks again