B & M shifter question

I went through this crap with my barracuda. tti headers and such. Started with a hurst promatic 2, burned up tranny. rebuilt, switched to b+m pro ratchet, burned up tranny. Tried to shield cable with rubber hose and tie up with out binding cable, was probably ok, but in retrospect, no matter how I tried to adjust cable to each gear they would not fall properly into each detent. thus burning tranny. maybe the top dollar shifters has provisions to compensate at the shifter. With severe frustration, I looked at my #`s matching 4 speed laying on the floor, and said your going in next! thus solving problem. but I`m sure someone on this site has solved cable shifter woe`s not falling into their detents. a good quality heat shield will probably work for you, but main`ly do not operate car if all shift`s don`t fall into their detents!!!!