I just finished swapping in a 231 v-6 out of a 75' Skyhawk. The engine is equipped with EGR and a choke that runs off of the heat from the exhaust manifold. I ditched the manifilds and put on some headers. All I did with the EGR was put vacuum caps on the outlets. The engine won't start. I know it is getting fuel and spark because it tries to start and it spits out smoke every once and a while. The spark plugs are fine and the plug wires are fine. The timing is dead on. The timing is even better than my old 225 v-6. WHY WON'T IT START? Is it the EGR? HELP!