A few years ago I removed my Turbo Action 10 " Converter from my 904 and installed a Boss Hog converter. ( I wanted a little less stall ) It was not worth a Damn and came apart in less than 1000 miles, and left shrapnel all through the trans. Took alot of cleaning, and had metal embedded in clutches ,valve body, governor. When I rebuilt it, I put the Turbo Action converter back in, and threw the Boss Hog out with the trash !