Swapped 305 for 350. Used 305 distributor in 350, big mistake! 350 will not communicate with Ecm for 305. Went to a One wire distibutor with vacuum advance. Readjusted valves, trying to set up edelbrock 600 to idle. She runs but will out of the blue die like she is starving for fuel or loses spark?? Thanx for letting me vent. I will attack the problems in the morning!! :oops: