I did my homework: the bore and stroke on the GMC "Big Brute" four was 4-1/2" x 6-1/2"
I'd say that's a "long-stroke" four!
Frank McMullen 1941 Chevy dump truck 1949 GMC 100 pick-up 1954 Chevy 3600 pick-up 1955.1 4400 dump truck 1941 De Soto & other MoPars 1928 Model A F**D Special Coupe