What about a 75 A body with power? I can measure my untouched car. I also bought a 3 1/2 off of ebay thinking it was for a 71 B body. Does this help?
I'd definitely be interested in the untouched 75 A body length!
And the 3-1/2" for the 71 B body is probably incorrect. PM me your address/info and I can send you the correct one. BUT, and heres the wacky part, I'm pretty sure either length will work on all these years from 66-93. The long coupling is only 1/2" longer. So you could have a long one on your 71 if it had been changed at some point in its history. I'm assuming at some point in 74 someone at Chrysler felt they needed more compliance/forgiveness in the coupling. Maybe for body flex or maybe for stack up tolerances? Anyone have any better guesses.
