compression? hp? torque guesses (i do not know)

[Marty68]

i own a 51 GMC. MII coil rear tremec 5 speed. it has (soon to be had) a 66 283. the 283 swallowed something no compression on 1 cylinder in each bank. i accuired an engine rom a club member..
here are its "STATS"
1978 vette 350 40 k miles
stock bore stock stroke
882 heads .500 springs bronze guides ? 202 valves?

eagle steel bem rods
roller rockers double roller timing chain
peed Pro H617CP Small Block Chevy 350
.275 Dome Hyper Pistons STD Bore 5.7" SBC

summit cam 1104

the question is what would be the compression?

whats estimated HP?
estimated torque?
can i cool it with my stock radiator? it did fine with the 283.