What did I buy?!

So, I picked up a 360 for my '76 Dart Sport('72 Demon clone) which is currently a slant/3 by the knee car. I wasnt really looking for a v8 and had intended on just building up a spare 225 I had an sticking a 4spd od behind it.

Then a local oldskool Mopar guy(Wayne Bowden) mentioned he had a complete 360 hed sell me. So I inquired more info and found that it had been rebuilt and only had around 5000 miles on it when it was pulled out. It was in a 70s era Dodge Vanbulance that was being used as a tow vehicle to pull a restored Dart to and from shows. I was told the motor was built as a torque motor. The specs, as best he could remember are as follows.
1970 coded 360 block bored .040 over
.040 over Hypreutic flat top pistons 9.5:1cr
New rings, bearings, mopar head gaskets, etc.
Jheads with new seats, guides, stainless valves(not sure on size), rockers, pushrods, lifters, double roller chain
New mystery cam(he thinks its a Comp 268 )
Edlebrock Performer intake mani with Holley 650 carb
stock 360 exhaust manifolds
Mopar Performance dizzy
electronic ignition
Accel wires and a MSD coil

The question is...

1.What do you think its good for hp and tq?
2.What should I change before I drop it in my Demon?
3.Was $600 a good deal on the engine?

Oh, and to go behind the Demon I have an early A833 to put in and am currently in the market for a suitable rearend. My goal is a fun driver that I can put some miles on and take to the track occasionally. Id like to run upper 12s to low 13s on pump gas.