I'm contemplating the same trans - the NV4500. Found a good one local for $800. The NV3500 is much more plentiful and I'm wondering if it'll hold up as well. They were used in S10's and full size Chevs with the 4.3L V6 - same bellhousing as the V8 although its integrated unlike the 4500 which can be removed. Its lighter and smaller and lighter duty, but is it enough? Rumor has it that the Advance Adapters setup fits both transmissions. Both have potential bearing noise issues over time.