I've just finished installing 4 port 13B in '77 AMC Pacer (just for fun). This carb came off about a '76 Cosmo, wondering if anyone has some experience with these to help with a few questions. I've plugged the 2 ports for the oil pump, running mixed fuel. The nipple to the left of the large adjustment screw goes to the distributor. Can all the other pipes be blocked off, including the one one the top on the other side, or are any critical to hook up somewhere? This came to be in a box, never saw the car. Also, the top bracket on the throttle side interferes with the secondaries opening, had the plastic shielded return spring attached, but when the rod (inside the spring) moves up, it makes contact before WOP. Also, the 2 ***** in the accelerator pump circuit, one metal, one plastic...which one goes under the pump, and under the discharge nozzle? Lastly is there a starting point (turns out) on the 2 adjusting screws for initial startup? Thanks for any input,
Seann

 

I'll look on my rx4 and I will let you know. Should be able to answer all of your questions.