Swapping a 427/TH400 into a former 327/PG 68 Camaro. I have two different driveshafts (original and one that is supposedly the correct length). Could someone please give me the correct measurements to fit with the longer TH400? Also, the TH400 I have came from a BB Monte Carlo, there are a few different tailshafts for the 400....will this application work? As always, thanks for the tech info--you guys are the best!