340 Swap

I'm buying a 340 engine off a buddy that he's had sitting around for 10 years. The engine was fully rebuilt with less than 1000 miles on it before the car it was in was damaged in a fender-bender. I'm unsure of the cam, pistons, etc... All I know is that it has Edelbrock Performer RPM heads and supposed to have a rowdy cam. The guy who originally built the engine spent a pretty penny on it.

I'm going to need to get a different torque converter (maybe 2400 stall?) but first I need to know what my compression ratio is with this engine & cam specs. Any tips on what I should do? I plan on taking the timing cover/chain off to check out the cam and pull the intake & heads to look at the cylinders/pistons. Any other advice? I plan on replacing my stock 360 with this 340 in my 69 Dart. I already have rebuilt 727 & 8.75 rear with 3.55's.

Or do I just send it and start doing burnouts?