I've got a 6.2 SWB C10 with SM465. I love the little truck, but it's just not cut out for highway driving. I've been kicking around switching to an NV3500 (probably S10 sourced), but haven't found a good deal on one yet. I'm not really thrilled with the integrated bell housing, but seems like a good fit for the application. But I'm wonder if there are better options that are dependable, reasonably easy conversion, and common/cheap (roughly in that order). What have you done, seen, or considered?