Camshafts and clearance

My goal is to be in the 7s in the 1/8th.. I'am running a 28x12.50x15 M/T E/T streets on 15x10 weld drag lites. But I have a set of 315x60x15 M/T E/T Drag Radials might be going on it..They are like a 29-29.5x12.4x`15..

I have read from 4/11/72 after 340s are externial balanced I have a 73 so Don't I to find a stall converter with the weight on it like for a 360..