No need to look for numbers on the chassis if it is a '54. There won't be any.

Check the crossmember where the bell housing sits. If the mounts are on an angle it is a '54. If they are horizontal it is earlier.

A '54 came with a closed driveshaft.

"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.