I currently have a 700r4 in my 86 buick. 4l80e is purchased and going in the car. big stuff 3 for controller. have heard of some possible problems with clearance issues.would like to retain proper speedometer cable operation,neutral safety switch and the like. G-FORCE makes a crossmember that is supposed to fit in the car what mount to use on it? ANY HELP FROM THOSE THAT HAVE DONE THE SWAP WOULD BE APPRECIATED (PICTURES TOO).