Ask any old Jeeper and he'll tell you that the SM420 was manufactured by GM but, at this point in time, its DNA is 100% Jeep. Having stated that, when I started planning a build, I wasn't looking for a 420; last manufactured in 1967, I didn't think I'd find one.
I found a '70 Chevy tow truck at a salvage yard. Assuming it was a SM465 I aquired the trans. Turned out to be a SM420 someone had put into the truck. Also had a PTO to run the winch. I rebuilt it with Novak's parts and instructions, installed their adapter, and now it's good to go.
I plan on installing a PTO gearbox (transfercase driven) at rear of Jeep to run a 6' finish mower. Am hoping I can use the transmission's PTO to run a hydraulic pump for a homemade 3 point hitch.
I have since come across another SM420 from a '62 fire truck (low mileage by nature :-) ). Its housing was from from loader forks but I have another housing; will probaby rebuild and sell it.
Below are a couple pics of the trans/t-case, with PTO not attach (dirty still, too).
http://i1170.photobucket.com/albums/r532/cadwelder/Mobile%20Uploads/IMG_20140416_101749_721_zpsf6fbd942.jpghttp://i1170.photobucket.com/albums/r532/cadwelder/Mobile%20Uploads/IMG_20140416_101803_591_zps64b0d09b.jpg
