ok I had an electrical problem that is now fixed I have replaced distributor, cap and rotor, coil, and plugs... we have set timing TDC 3 times and upon start up, car idles terrible but will eventually rev up fine and then back down to a lopey idle with no power. cylinders 3,4,5,6 are not firing hot enough... what could cause this sudden problem?

 

IIRC those are the ones fed by the pass side of the carb, if this is a stock intake.... if they all share an issue in common, I'd look toward the one thing they all have in common.

 

forgot to mention its not a stock intake. i switched from tbi to carb and it has an edel performer rpm with a edel 1406... ive been hearing i may have wiped a lobe on the cam judging by the way it runs? or even head problems... i did a compression check, highest being 165, lowest was 120(others were 140-150) which has me leaning towards the heads. Any suggestions?

 

Try loosening your rocker arms one full turn and re-test.