A '54/'55 Chevy COE, can have either a 235, or 261ci. engine. Check for the casting no., on the passenger side of the block, to the front of the dist., around the area, of the fuel pump. I just went out, & measured the rear wheels, on my '53 Chevy COE with 9.00 X 20's, on the rear, & the outer tire measurements, from sidewall, to side wall were 92"in., & the inner tire measurement was 72"in. This will vary, depending on the size tires, on your truck.
