burn out question

..............If ur running a 727 with stock vb or with a shift kit u will need to do ur burnout in manual low, which means ur shifter is in 1st..........which applys the rear band.....the problem isn't doing the b o in 1st, when u shift to 2nd the overrunning clutch[sprag] starts to free wheel.......it has nothing to slow it down and stop b 4 the wheels grab traction, the problem is then the tranny shifts back to 1st placing extreme loading on the sprag.........moral of the story is if u dont have a manual vb u do ur b o in 1st only, no upshifting..........kim.......