I will post up a link in the FAQ for this post. Nice find on those links.
As far as the info we got the NV3500 only came on V8s 94-95
Here is a copy from the FAQ. The link at the bottom also only lists the 3500 for 94-up on V8 Dakotas.
1987 - 1991 New Process A535 / NV2500 (same transmission... the name changed when the company was sold)
1992 - 1993:
L4 and V6 AX-15 5-speed (1st 3.83, 2nd 2.33, 3rd 1.44, 4th 0.79 Rev. 4.22)
V8 No Manual trans offered.
1994 - 1996
L4 and V6 AX-15 5-speed
V8 NV3500 5-speed (1st 4.01, 2nd 2.32, 3rd 1.40, 4th 1.00,5th 0.73, Rev. 3.55)
is a list of Manual transmissions by make and year.