Looks like a Frankeinstein truck.
It's pretty obvious that it has an earlier '47-'50 cab.
It does however sport a few "1953 only parts".
The "seashell" design horn on the intake is 1953 only.
{ earlier trucks had the model T style horn on the intake & the 1954's had the horns mounted on the radiator support}.
The side mount spare tire carrier was first offered in 1953.
{not avaliable in trucks before 1953 }.1953 was the only year that had a mount that fit the angled bed sides.
1953 was the only year that had a maroon parking brake release knob.
{ earlier trucks had a chrome "T" handle & the '54 trucks had a black knob }.
The Dead giveaway here is.....
Truck VIN plates were black on aluminum from 1947-1952.
In 1953 the truck VIN plates were changed to blue on aluminum.
Looks like an earlier VIN plate is on this thing.
Has the correct '53 side hood emblems but, they look like repops.
It has the earlier style heater { not the 1953 specific one }.
I am gonna say they started out with a rusty { or wrecked } '53 & installed an earlier '47-'50 cab on that frame & transfered over some of the '53 specific parts to their rebuild.