heavy engine braking & cheetah VB

The shifter is a b&m quick silver ratchet shifter. the cable is brand new. and adjusted. I'll double check the adjustment again though. the orig.vb shifted fine before. 67Dart273 - there's no forward movement in 2nd/3rd from a dead stop. Rice Nuker - I follwed the instructions that came with. I'll pull the pan and check out the band make sure its adjusted right. I am shifting it in the proper direction. This is what i got http://www.summitracing.com/parts/TAC-17156/ how do i find if it is a rear band apply? I'll check everything and get back in a couple days. calling for rain... Thanks everyone. Please let me know if you think of anything else.