I went with an SM465 because its so short and allowed for a longer driveshaft. You might consider selling the nv3500 and going for a SM465. They can be had pretty cheap and are near bulletproof, plus you get a granny gear. I would also look into a megashort SYE kit
"Keep your booger hook off of the bang switch"
'88 YJ SBC 350 w/ goodies, SM465 Transmission, Ford 8.8 Posi, NP231 w/ MegaShort SYE, 3.5" BDS Lift, 5/8" Boom Shackles, 33x12.50 Goodyear Duratracs, Supertop, TJ Flares, Bedlined, etc.