long screw for front carb bowl stripped???

Can you post some pictures? check out the thread(s) condition---- hopefully this a top bolt- right now your seal is good from being pressed on for a time -- once you break it it will be difficult to reseal.
I do not think thread dope/tape will help-- if your threads are gone now.

As for ft/pounds on the screws it might be moe like inch pounds-- tighten like an intake manifold-- snug all 4 & continue a circular pattern until hand tight. Gasket compresses & no leaks!!

Lawrence