How to ID a real MP 360 crate magnum, id the HP rating, and what's it worth?

autoxcuda said
So the pictures don’t show the intake?

The motors had all new parts. This is coming from ns1rm21 that guesses he sold about 200 small block crate during his time running Westoaks Mopar Performance.

Thanks, what are the options there? I mean between the 300hp version and the upper ones? Looks like an M1?