I got a rebuilt 350 edellbrok performer heads mild cam, about 14 in. vac. @ 850 rpm sanderson block huggers 1"5/8, air gap manifold slayer 600 carb just wanted to know about squiter nozzels it comes with a 31 and has a stumble went to a 37 still has a stumble would it be normal to use a 41 with a hollow screw, will it need a 50cc upgrade does this sound like somthing a 350 would need?