Well you could put twin turbos on it, the seamaster 534 came with twin turbos, im not sure what they used, but I was thinking somthing along the lines of two fat shaft 62s, you can put those on a 302 and it runs great, wont last long but runs good for a while, i would suggest somthing a little smaller than fat shaft 62s for it if you want it to last. I know im going to put a f534 in an old 1960 or 1972 ford with twin turbos some day, and they came with 7, 10 and 13 speed eatons behind them, that should hold up.