Need some help on this.
I have a lot of Real Model conversions for The Italeri M925's.
Question is are the Chassis the same length for the M813 and the M925. The instructions for the conver sets for Real Model are not too informative.

Stolen from Wikipedia:
"The M939 series was a Product Improvement Package of the M809, with updated engine, transmission, and brakes. A new, larger cab and tilt-forward hood were a major visual change from earlier trucks. Early M939s were rebuilds of M809 vehicles, suffix –A2 are new production by Bowen-McLaughlin-York/BMY with later model Cummins engine."

At least they have the same wheel bases ....
/ Robin

The M809 series and M939 series use the same chassis/wheelbase. The M39 series (M54) was slightly shorter, with 1/8 inch in 1/35 removed just behind the cab.