The problem with Mitsubishi transmission failures revolve around the transmission cases flexing. There is an easy solution for this too - a reinforced sump plate. The Conquest has them and I think Monteros (?). The cover/sump plates have ribs on them that stiffen the transmission casings. It'll hold 500 HP. There is an aftermarket cover plate available (Tuffpan) but I think they are no longer in production or scarce but they could be reproduced easily enough as it's only a 1/2" thick piece of billet aluminium with recessed bolt holes in it.