Four wheel drive, originally a V8...and I forget how much is actually encoded into the 134 bit but my '70 is a CE134 and it's a 2WD V8 1/2 ton shortbed fleetside.
F is the assembly plant code...same as Chevies, AFAIK, don't know what plant it stands for, though. Everything after the F1 is just the sequence number (17892).
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Project 1970 - soon to be seen at
http://milhouse.treylis.org:81/