I believe I have one. ZF5 and C6 are same length for big block and diesel. Only small block ZF has different length shafts than C6/NP435.
Anyhow. I measured my '86 CCLB C6 NP208 and it's 31" from center at tcase to center of carrier. 41" c/c of the front section as installed in my truck.
I also have a shorter shaft that is 29" from tcase center to center of carrier. That shaft has a rear section attached which is 40" c/c.
Both shafts look like the usual 1330/1330f joints by eyeballing them. I have some other shafts in my pile as well but they looked like front shafts so I didn't dig them out. Let me know if either will work or post up the measurements you need and I can check the rest of my pile. You're about an hour drive from me, I used to work up your way years ago.
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