the wire for your choke should come from the alternator. To pintoman2009. ill look at that to while im over at the garage. I still have my choke set up for electric. YES im running a choke on my race car. I like to play with the race car all year, and it doesn't want to start when its cold. But i havent noticed any changes in performance with or without the choke, but then i am running a stock engine class.
oops its been awhile since i was under the hood. i did away with the electric, and put a heat riser one on instead. I was tying into the wire that supplied the power to the fields in the alternator, but now that im thinking about it, its not very effective that way, cause if the voltage regulator isnt supply power thru that wire then the electric choke will only work when the alternator is charging. Mustang II haynes manuals will have wiring diagrams in them, i just looked at the old chilton pinto one and it doesn't even have a diagram for anything except the fuse box. If I can find my haynes manual, I can email you the diagram if you'd like.