360 Damper Install

Lookin' good OP. If it drew down on the crank snout and reached a point where it suddenly started torquing hard, then it sounds like it seated well.

Not sure why vaseline wouldn't help priming, especially with a used pump. OF course, gobs of engines have been started and run with no priming of any types, and lasted just fine, including racing engines. (Some cannot be primed except by a pressurised oil source.) Priming at least helps spot some common errors... like oil gallery plugs left out, and feeling for the turning resistance to increase when the pressure comes up.