Thanks folks. I'm 90% sure I'll jump on the other motor and run this one until it dies, but this one just sounds like HELL. At a certain throttle setting, it rattles like tin cans full of rocks in a clothes dryer. Light throttle it's fine, heavy throttle it's fine, mid throttle(right at cruising power level) and it sounds TERRIBLE. Really embarrassing to drive, sounding like it's knocking like crazy. All the worse because when I first started driving it, it sounded so sweet.

If the pro can't figure it out I'm dumping it, new motor time.

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617 swapped Toyota Pickup, 22-24 MPG, 50k miles on swap