cj7,
You had Ross forged pistons in there before, correct?
That cam has a lot of duration and valve overlap for Jeep motor. the actual intake closing point is considerably later than what you used in your calculation. I know KB says use the intake closing point at .050 lift plus 15 degees, but this is just a guess to help people use the cam card specs. The actual closing point with 294 duration at .006 tappet lift is 72 degrees - assuming the intake CL was set as specified.
To shorten up the discussion, I don't know what you finally arrived at for bore diameter after clean up but I would choose a piston that closes that quench distance to .045 (zero deck) and gets your static compression closer to 9:1 - coupled with a dish piston such as the KB 354 (28cc) you may also need to open up the head chambers to around 65cc to acheive this.
For a good torque motor in a Jeep, I would then choose a cam with a 112LSA and overlap of about 32-35 degrees. An intake closing point of 56 degrees ABDC should keep cylinder pressure in check with the above setup.
You are running stock unported heads, right? If so, an Engle 5016H cam or something similar would fit the bill.
PS: Those are some really slow lobe ramps on that Clevite cam = 294 duration @ .006 and 218 @ .050.
Compare that to an Engle 5020H = 270 dur @ .006 and 226 @ .050.