Personally, I would never consider running that trans without pulling completely apart and, at the VERY least inspecting if not just outright changing all the bearings. The comment was made that those tranny's are not made for the HP that the E-6 produces and that is correct. However, unless you intend to pull HEAVY loads or maybe race it in the 1/4 mile, it shouldn't matter. I would think that a good, serviceable duplex should be easy to find and cheaper to buy than rebuilding what you have. If you DO Intend to pull relatively heavy loads, heavy enough that you want a dual disk clutch, being a 283, that engine should be a Maxidyne (EM-283) and if so, a 6 speed Maxitorque was designed for the torque curve generated by that engine and should also be relatively easy and inexpensive to find. I have all that stuff, twin stick 6 speed, dual disk clutch assembly and bell crank setup for converting the linkage BUT, the shipping would probably be pretty steep and then there is crossing the boarder from Canada which may, or may not create issues (it SHOULDN'T but we are taking about Govt so). Kinda too bad, if you WERE interested, I just came back from Oklahoma and could have taken it with me and shipped it from there. BTW, I also have a duplex to sell but again, shipping would be prohibitive and I don't think you would have any trouble finding either a duplex OR a 6spd Maxitorque either locally or at least relatively close. They are fairly plentiful. Also, I]the reason I am suggesting a duplex rather than a triplex or quadplex should you search out a replacement is that, with the Maxitorque engine you don't NEED 15 speeds of the triplex, you don't really NEED the 10 speeds of the duplex, the engine was designed to run with 6 speeds (5 actually). Well, that is all that I think I know but I am a neophyte when to come to these Marks so I am not guaranteeing anything I had said to be "gospel", just what I have gathered in my recent and ongoing B-61 engine swap journey. All just opinions and worth exactly what you paid for it (maybe less) LOL.