A 1948 4400 is a 1-1/2 ton with a 161" wheelbase.
The cab, including doors, is the same as the smaller trucks. I'm not sure about the fendersand hood but I think they are the same as 2-ton, which are bigger than pick-up ones.
The 270 is a great motor. It is a real truck motor. As GMCpanel inferred, the chevrolet trucks came with a car motor.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.