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

YY1 said
What was the change that made it 320 vs the original 300?

300 HP Commando LA motor: high swirl production heads (1.88 intake, .474-280-60 purple cam) .1993-1994 MP catalog and earlier P/N P4529783

300 HP Magnum motor: with production heads w/1.92 intake, .385/.401-250/264 cam. 1995 to at least 2002 MP catalog P/N P5249498

320 HP was Magnum motor: with R/T heads w/2.02 intake, .385/.401-250/264 cam. Sometime after 2002 to at least 2007 MP catalog P/N P5153476

Edit: many changes in crate motors over