Originally Posted by Custom10
you could try using manifold vacuum instead of ported, this would add the extra timing at idle lost by backing down the base timing then you can back down the idle screw so as not to expose the transfer slots too much. Again this is were an adjustable can comes into play as well cause you can tinker with how much advance is added at idle by the vacuum can.
Thanks. I've already tried that though. The rpm drop from being in park and then into gear was just too much and it jerked the car. It would be like 1000 in park down to 550 in gear because of this vac can. I get 11" in park and 6-8" in gear. I think I'm going to pull the carb off and look at the transition slots and see if they're open too much.