Hey, great post, I realize its 9-10 months old. Awesome job maintaining the original shifter location. I did pretty much the same swap 25 years ago(1995) on my '78 Monte Carlo, Saginaw to Super T-10 sourced from a '77 Z28, I also run a 3.23 gear and feel its a perfect combination. I wasn't quite as creative as you were and settled for relocating the the shifter housing on the transmission hump rearward about 6". I can't remember wrestling too much with the aftermarket Hurst shifter(also a competition Plus) or the rods, everything pretty much bolted up and fell right into place with exception to the reverse light switch, I've gone without for those 25 years, though I've now been motivated, I may steal your concept. Seems like I did have to source a longer speedo cable as well, I don't recall exactly what I did but do remember the stretch to hook it up. My Super T-10 sits behind a ZZ3 350 (also installed in '95) with 3.23 (as mentioned previously) 7.5" posi gear, while not a crazy street terror like some of these LS or BB G bodies we're seeing now days, its quick yet civilized and a blast to drive.