years back the big 3 auto makers ford, gm, Chrysler-Dodge
all had truck chassis being used for MH's
Chrysler quit supplying Dodge truck chassis to the RV industry
GM sold off/spun off, the P30 chassis as the 'Workhorse' line
and that is no longer in production
Ford is the only one presently supplying a Gasoline powered stripped Chassis to the RV industry for 'Class A' MH's
and its been that way for almost a decade
in the 70's Dodge was the most common chassis for Class A, gas driven MH's
right now its Ford chassis, the F53