383 build no power

Well something's not right.
If the compression really is 10.7 and the cam is a 284/108 in at 104, then the ICA (Intake closing Angle) should be 66*. with those inputs, in a stock bore/stroke 383, the cylinder pressure should be closer to 170psi.And more importantly the Dcr should come in around 8.36, and that should make plenty enough torque to lite up 215s right off idle.
Because the pressure is down, and because it does not lite them up, I have to think that the C/R is not 10.7, or the cam is not in right, or the pressure is leaking away.
But moving the ICA to 70 * would still only drop the pressure about 8psi, to 162.

Now if the C/R is actually closer to 9.7, and with the ICA at 66*(cam in at 104*), then the cylinder pressure would be right around what you currently have.Now if that reflects reality then the Dcr would be down around 7.6, and that would be some lazy at low rpm.

So at this point I would be doing a Leakdown Test to prove the valves and rings are sealing.If they are sealing, then I see no way past this except a higher stall TC, to get the rpm up to where the torque is.

Or, as I would probably do, toss that bad-boy cam.