A couple years ago retrieved my '54 630 GMC from Kansas City to CO, had a nice drive across KS and CO in early September., on highway 36, had some rain, had to stop and install cardboard thermostat, 6 to 9 mpg according to mileposts, nothing fell off, nothing broke, nothing caught on fire. Had a nice time.
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires. '47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle. '54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed. '55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.