Carter carb tuning help

I'm running the electronic conversion on the dist, the car ran great after the rebuild of the carb a while ago but now it runs crappy. Also i know this sounds bad but i don't know my exact timing. The timing mark is gone and i dont know how to remark it, the balancer was so rusty i lost the factory mark. I will check fuel pressure tonight and let you know what i find, I really appreciate the help guys. Like i said fuel injection i can figure out no prob but carbs are a little weird for me right now, but i will learn them...........oh yes i will learn them :evil2: