I have a 99 s10 with a 02 4.3 along with the nv3500. I am looking to get ride of the 5 speed and swap in the 700r4 instead of the factory 4l60e, reason being my mechanic will build me one with a shift kit for $500. To install the 4l60e it requires the harness and its $1500 to be installed. Now my question is can i use the cross member that is already holding up my nv3500 or do i need to find different one. And where?