I just finished rebuilding my engine (Anderson B31 cam, .030 Over Forged Summit pistons, The crank was ground, all new bearings and rings, new 1.6 crane stud mount rockers, gt40p heads with upgraded springs, explorer intake, 42lb injectors) and installed an on3 70mm Single Turbo kit. It was hard to start at first, but after adjusting the timing, got it to fire up. The engine ran perfectly (minus being too rich at first until unplugging the MAF sensor because of the wrong table, still needs a tune, but it ran much better with the MAF unplugged temporarily) for a little while, until we put the car on the ground after coolant was bled to test drive, the engine started knocking pretty badly. I relashed the valves with no avail. After putting the car back in the air and starting it with a buddy under there feeling around, the knocking was equally as bad on the transmission, oil pan, and valve covers. We unhooked the clutch cable thinking a misaligned clutch could've been the issue but that didn't solve the issue. Stumped, we pulled the engine out of the car and took the oil pan off. Nothing really caught our eye, but the rods moved side to side on the crank slightly. So then we took off the lower intake to check the top end, didn't find any problems. I'm pretty much out of ideas at this point, has anyone had a similar problem, or can point me in the right direction of what the problem could be?