351W Troubles........................

1983 Bronco
351W
I have replaced the coil, wires, distributer cap and rotor, and the
spark plugs. Removed varible venturi carb and put on a older 2 barrel
carb from a 91' f-350 with a 351W. All I'm getting it 12 gauge gun
shot gun blasts from the engine once every 30 15 seconds. What should
I try and do? Is my timing off? It could be....... But would that
prevent the engine from running NOT at all?? I was told there was a
pick up coil and after taking the bottom on the distributer apart I
found NO "pick-up" coil. I have NO vacum advance on the distbuter,
When I bought the bronc a few hoses are plugeed here and there with
screws, nothing out of the ordinary for an old vehical. What vital
things am i missing? Getting good spurts of fuel from the pump when
turrning the engine over. Step by step process? Thanks guys!