It is just Nick's way of saying his GT was better than other peoples...it means nothing
I'd just turn the crank via a breaker bar really slowly after everything is installed and watch all the parts move...if there is an obstruction of some sort...then you should be able to pinpoint where it is coming from based on the TDC of a piston...but thats just what I would do...and I'm am far from a internals expert.