this is my first skid loader and the first post,,,,,, The problem that I have is that i got a M371 and they swapped the engine with a 11 hp Briggs i have found a k321 that i can buy for $150 but this has only 1 elect.. pulley on it so my thought is that i need a new crankshaft but do not know what size/length i need or how to set up the pulleys... form what i can tell i need 3 pulleys 1 runs all the time for the pump and 2 for the low and high of the gear drive with a elect.. clutch any thoughts on this?