I swapped out my Rochester 4GC Carb for an Edelbrock 1406 with electric choke on my 65' 442. I have two questions, Does my vacum advance on my distributor need ported or manifold vacum? The Edelbrock has two ports on the front. Also where is a good place to wire my electric choke, The instruction manual says to use any ignition switch activated circuit, but warns against using the positive side of the coil. Any suggestions?