CC10703 is a C10 Short wheel base truck with F44 Big 10 rear suspension.
If the Engine code is in that 1977, it didn't come in it... Its a 1975 454.
T0610TSM =
T = Tonawanda
06 = June
10 = 10th day
TSM = 1975 Truck, 454ci, 215hp, 475 Trans, LS-4 (RPO), VIN Z, L, 20, 30