m50

I am looking to replace the older heat exchanger on my 5432. I know there is a replacement/upgrade to a 3" unit from the newer M40 model but I am wondering if a heat exchanger from an M50 will fit? According to my research the M40 unit is 3"x13" and the M50 unit is 3"x17". I can check the...

Does anyone know how much fluid (ATF) the tranny takes? I want to change it and an not sure how much to get. Cant be more than a few quarts right?

Long shot here but does anyone know the correct radiator cap for an M-50? I am sure there is a commanly available cap that I can get at an auto parts store but they are all a little different and the one I bought that I thought would work does not appear to be long/deep enough. I am hoping for...

Does anyone know where I can get a handle to crank start my M-50 that would fit on the fixture shown in the picture? thanks, Chris