What crate engines is everyone using??

I picked up a mopar perf 360 I believe 420 hp. I got it from the dealer ship. Someone ordered it and put a 2000.00 dep on it and never came back to pick it up. I knew the guy in parts and I got it less the 2 grand.
I have built lots of motors but figured a block filled with all those new parts had to be worth it.