Welcome to the CRG Discussion Forum!Forum registration problems: Make sure you enter your email correctly and you check your spam box first. *Then* email KurtS2@gmail for help.
As long as you keep everything and it doesn't prevent you from being able to go back without noticing anything, I don't see a problem with it. There are some people on here and TC that have their original engines on a stand in a corner and have some other engine in the car.
I think he meant to put an aftermarket harmonic damper on the engine.