well, the ones I've head about first hand (I know/knew the owners)... Noises traced to: rod bolts not torqued, rods in backwards, main cap missing main bolt (how the heck???). These next ones were problems found after some run time..minutes, or a few miles: lifter noises, smoking due to rings with gaps lined up, guides too lose (same motor, had 2 valves too tight...must average out), leaking intake gaskets. In one case, he got one, it was bad out of the crate (you could hear a rod banging around when turning it with the starter), the bolts were never tightened, and the bearing was ratting around in the end of the rod. So, MP warranteed it. The second one ran for 3 mintues before the oil pressure went away, and it was shut down and returned without investigation. #3 was gotten, installed, and leaked out the rear main,and ended up having a ton of endplay. That one was sent to a hemi specialist, rebuilt by him, and has been running well for 3 years. Considering I only know about 6 guys that bought them over the course of 7 years. Of those 6, 4 had problems of some sort, requiring parts and labor to repair. they have a 33% GOOD record by my first hand experience. And I read about a lot of others. Not making the power they should, poor running, smoking, major leaking. Of the ones I'm personally saw, MP replaced the early one, and supplied parts only (no monetary reimbursment) for shops or owners to fix the others. For $10K or more, as an assembly, they flat out suck. They are a great way to get your hands on a new block and parts tho. I would still buy one. But the whole thing would come apart before it was ever installed and I'd go thru every inch of it.
