Join Date: Mar 2010
Location: Stoney Creek, Ontario
Not sure if the F100 is different from the rest, but, you should be able to use frames right up to 1979. There do seem to be a few exceptions. Somewhere in the mid 70's, Ford used an odd frame width. It was a little wider than normal. There were a couple of strange wheel bases, too. Mostly on heavier trucks, like F250 and F350. However, cabs and front clips should mount up.
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The Past - 1976 F-350 Crew Cab 1992 - 2006 RIP
The Past - 1995 F-150 XL Enforcer All Gear Drive 2008 - 2015
The Present - 1993 F-250 XLT Turbo Diesel Super Cab 4x4 2015 - ?
The Future - Who knows?