b and m megashifter nightmare

I put an a body shifter int a 59 full size with a 727 from a truck.
It gave me fits, bending welding and doing over. I couldnt get the ranges close enough to work. After day 3 i drilled a hole in shifter arm-shifted into low and moved rod along shifter arm until it was about centered on arm.it was about 1/2" in from original hole. Everything was golden after that.