New motor backfiring through carb

what the concern is, when you pull the distributor drive to spin the pump, it might not go back in on the right tooth in relation to the cam. then the slot would not be right. so if you use whatever marks you made, it still might not be in the right place relative to TDC. do you have a picture of how you marked everything?

Nope. It doesn’t matter. I screwed up somewhere along the line so I’m starting from scratch tomorrow. My best guess is that when I pulled the distributor out to prime the pump that the shaft spun. I made sure the gears were on what I thought was the correct tooth but if it had spun at that point then I was off. Who knows but I’ll have it taken care of tomorrow hopefully.