vin # on the rear floor is 1-0748216
# ON THE ENGINE IS 1570191
i'll take a stab at this.
first of all, the engine is from a 56. probably built between feb-april 1956.
secondly, i think your vin # has one too many #'s in it. if it was 1-074821 it would be a 56 and would match your engine #.
if the # is 1-748216, your car would be a 54. which it definately is not because it lacks semi's.
i know jason (bananasplit) is good with this stuff. hopefully he or someone else will help out or confirm what i have stated.
i'm 95% sure it's a 56 model built in the early months of 1956.