Originally Posted by jimgmc
The 248 started in 47 for the FC-303

Maybe, but his door tag says it is a CC-303.

According to "GMC Trucks Master Parts Book Models 100 thru 470" printed in 1954, CC-30x models were built in:

1941 with chassis serial numbers ending in 001-2000, 2001-20706, 20742-20769, 22001-28823 Jim's 20465 chassis serial number falls in 1941
1942 with chassis serial numbers ending in 20707-20741, 20770-21547
1944 with chassis serial numbers ending in 28824-32749
1945 with chassis serial numbers ending in 32750-46906
1946 with chassis serial numbers ending in 46907-49518

This same parts book says that the CC30x series trucks have either 228 or 236 engines with no explanation of which engines were used in which trucks. Further back in the same book under "8.0400 Cylinder Block" (which is sold as what we would call a "short block" - has pistons, crank, cam, bearings, etc.) makes no mention of a 236 engine, so by 1953 it looks like any replacement from GMC would either be a 228, 248, 270 or 302.

Last edited by Bill Hanlon; 08/16/2023 9:52 PM.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.