72/68 blazer 4x4 dream/nightmare

[Madtrucker]

Figure I'll post again in hope of some good advice. Finally somewhat settled in the new house, I started trouble shooting the power issue again. I started by running a new 12g wire to a new summit hei distributor. I also added a new summit 600 carb, fuel pump, and regulator. Drained the tank and started with fresh gas. New plugs, wires and pcv valve. Checked for vacuum leaks, and double checked tdc. All this and still hasn't solved the problem. In fact it worse now because now pop back through the carb while hard accelerating and run on when I shut it down. I'm so frustrated I listed it for sale last night.
I plan to check the compression after a little more carb tuning fails. Any insight would be greatly appreciated, I have little time to work on it and would love to start enjoying it.