OK so its not a Pro-Star BUT...
I saw this at a car show i was at in st pete this past weekend... this guy built it about 25 years ago or so..
its a 1975 3/4 ton chevy chassis unmodified, (383 stroker and TH-400 trans), a full kenworth day-cab unmodified and a 1985 Ford F-series bed... he said it was magical how it just all kind of fit together as he and his buddies built it as a shop experiment from a Blown up kenworth, a rusted out chevy truck.. and the bed they found at a junk yard by accident...
-Christopher