I ran a 350 in my '49 3100 for 18+ years with the stock radiator and never had a problem with it wanting to heat up.

I made one trip across the Hanford area with all my shop gear (loaded roll around, engine hoist, couple of welders, a workbench and anyplace that still had room, had loose parts packed in) in August of '89. When I got to Richland, WA, the ambient temperature was at 105. Engine temp never went above 200 with a 195 thermostat.

John


'38 Chevy 1-1/2 ton
'49 Chevy 1/2 ton
'54 Chevy 6400 2 ton
'55.2 GMC 3/4 ton
'56 GMC 1-ton

No Room Left in Shop