[BILT4ME]

You can use a long screwdriver and press it to your ear and touch it to different areas on the block, valve cover, oil pan, etc.

Did you do anything with the oil pump while you had it out? Did it suck up some debris in the oil pan and the pump screen fell off?

It does NOT sound like the crankshaft is hitting anything and does not sound fast enough to be related to the cam (it turns half the speed of the cranks).

Distributor not seated
Starter dragging or rubbing the flywheel
Timing chain rubbing the cover
Oil pump shelling out
Accessory (AC Pump, Alternator, PS pump) dragging/rubbing/hitting/dry
Transmission pump dry (Is there fluid in the transmission?)
Parking Pawl dragging inside the transmission
Transmission in gear due to improper adjustment....
Too long of a bolt in the TC cover dragging on the teeth of the TC


Just spitballing to throw out ideas.......