Getting a clunk from the rods, need help

Any chance the noise is coming from the transmission dust cover?

^^ seen this before-thought for sure my friend's Ramcharger had a bottom end knock-sounded so similar. Turned out to be loose converter bolts.

I don't suppose you have some video clips you could post do ya?

Don't forget to check the torque converter bolts. Loose converter bolts can cause this also. Flex plate to converter...

I was hoping this would get brought up before a perfectly good engine got torn into. :D