This guy e-mailed me & I told him to come here for some help, after I told him what I think I know, which was:

1L733F117914

1 = year - 1961
L = Low Cab Forward
7 = 70 series
3 = 145 wheelbase
3 = Cab & chassis
F = gvw rating
117914 = serial number

That makes this a 1961 Chevrolet L70 Spartan Low Cab Forward Truck.

So If I'm right or wrong can some one let us know. Thanks.

1965 GMC 3500 Rescue in the Stovebolt Gallery

My Facebook Links:
Jolly Goodfellow.
the 6066 GMC Guy.
Jolly's Truck & Car Show Page.
Owner of ~ 1965 GMC 3500 Custom Rescue Squad {Black Built Bodies}.