[RocktimusPryme]

My only question would be about the pistons being slightly out of the hole. Would a factory motor not more than likely be down in the hole?

My point being that a factory motor would be even worse than advertised on compression.

[Formulajones]

Originally Posted by RocktimusPryme

My only question would be about the pistons being slightly out of the hole. Would a factory motor not more than likely be down in the hole?

My point being that a factory motor would be even worse than advertised on compression.

Correct, a factory engine more times than not from my experience is lower than advertised compression, because the pistons are generally down in the hole, and that distance varies. Some of it varies because crankshafts I find aren't ground exactly to stroke either (some are shorter than advertised) and that's another issue with factory engines that can be corrected during the rebuild.