One day I'm going to do the plant tour there and see just what they do.
They build the LS V8 motors and the V6's there. Used to do the Gen 1 vortec V8 motors before. My friends dad was a lead hand there years ago and would know exactly what they do/did...don't. Used to get us lots of cool SBC engine parts for building our hot rods, way back.
I don't doubt for a minute that you can and do improve on GM's crate motors but I'm assuming this posters motor is low mileage and in good overall condition and should be fine for a low buck budget build up. Got to keep the costs in check or its no longer a "budget build."