Warranty Plate located either on the inside of the glove box door, or on left door face below latch.

Has the VIN, actual wheelbase in inches, codes for the: COLOR/MODEL/BODY/TRANS/AXLE stamped on it, along with the max GVW, net HP & RPM, DSO code.

Truck didn't come w/a 390 originally...if that's what it is...which I doubt.

390 is an FE engine, all FE's look exactly the same. 390's introduced in 1968 F100/350's, used thru 1976. So it could be a 352/360/390/410/428 or?

This truck came with an FT engine originally and all FT's look the same and look similar to FE engines!

This truck originally came with a remote mounted power brake booster (Hydro-Vac) and single pot master cylinder.

Looks like a F100/350 booster/dual master swapped in, actual year unknown, dual masters intro'd in 1967.

1971 was the first year Ford offered F600's with 4WD, previous years are all conversions.

What year is it? Last 6 digits of VIN will decode to such. This truck has a 1963 only grille, 1962/64 upper grille panel. 1965/66 upper grille panel has the parking lamps within it.