My 58 1.5 ton has tapper bearings and my 59 bus (1.5 ton frame) has roller bearings. I haven't taken measurements (spindle, etc) but I'm thinking they can be converted and will be interested in what you find out.

Victor

~ Victor
1941 3/4-Ton Pickup (in process). Read about it in the DITY Gallery
1955 Grumman Kurbside "Doughboy" 235/3 on tree w/ OD
1957 3100 - moved on
1959 C4500 Short Bus "Magic Bus" - moved on
1959 G3800 1 Ton Dually "Chief" - moved on
1958 C4400 Viking "Thor" ~ moved on to fellow Bolter