454 with Rochester quadrajet M4CMC(?) model number #17081226 How do I set the fuel / air mixture? I don't know how to measure rich v. lean. Exhaust has strong gas smell. Also, the idle speed solenoid has an electrical male plug on it. From where does it get power? When I rewired with Painless #10205, I had wire for electric choke, but no other. Any help? Most appreciated!