Is it my carb?

i would advise to check the clearance inside of the motorbox before you buy glenwood manifolds.you can buy a complete set of pcm for 700.00 and that includes all hardware. pcm started using that style in 1970. also why did you put a rochcester on you ford? is it a 2v?

I had the same problem with my holly it was the timing on minealso had a broken spring in the distributer

My Holman-Moody came with tapered aluminum headers. They were real clean looking. The engine developed a burned exhaust valve and by the time it was discovered it had eaten a hole right through the header. Bummer. I went back with OSCO's, which don't look as clean. But they give much better access to the starter and plugs, though.
Al

a timing light will tell you if your weights are getting hung up, but it would not hurt to clean and lube them.

these are from glennwood.

power valve could also be an issue if you have a holley. carbs never work 'out of the box' for me. diagnostics are faster with the proper tools vac. gauge, advancing timing light ect. damn fords.

there are some center eiser exhaust on ebay right now , but they are asking a new price.
there is a performance gain with the center riser set up and i believe pcm was the first to venture into that type set up. new pcm stuff for each side will hit the 500 mark with a gasket/bolt set. osco stuff is heavier duty and cheaper, but i think its ugly.

you can get aluminum log style for the 351 also.

i would say you have fuel issues, but it could be other things. do a FULL tune up and take it from there. replace the cap, points, wires, plugs, condensor, both fuel filters and possibly the coil or key switch.


after that go through trouble shoot list in the manuals in the reference section.

is you check valve still on the fuel line? have you changed the fuel filter and if so what was in it when you changed it? is your fuel tank vent open? do you buy gas at the marina? running extra ballast or weight? ever cleaned the flame/spark arrestor?