previous owner sounds as if he doesnt know very much about chevies, but heck nice deal there
rockcrusher is just a name
means crap
what trans does it have 4 speed or what ?
if its 4 speed(the big toploader 175lb tranny) then its the SM420
[img]
http://www.stovebolt.com/features/bigtrucks/sm420.jpg[/img]
if its three then its the sm318(little side loader car style tranny, 4 bolt side cover)
good luck
