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Looking at a set of cal-tracs for my 67 f100. According to Calverts website, they offer a part number for 62-67 and another for 68-72. Are there differences between 67 and 68 in the rear suspension and frame? I would have thought all 67-72 would be the same but I'm finding out there's several 67 specific parts during this build.
Simplest thing would be to call them and ask. The '67's have all kinds of odds and ends that are different from the 68-72 in appearance and interior stuff so it would not surprise me if it was spring rate or something goofy like that.
Thanks! Yeah, sometimes the simplest answer is the correct one. I called them and they advised the difference is in the bushing size. 67 apparently is smaller than 68, but all their kits come with both size bushings. So not sure why there's two different part numbers.
1957/72 F100 2WD rear springs interchange unless the 1968/72 F100 has Flex-O-Matic > > The springs are different, the shackles are different, the whole enchilada is different.
Pic: Flex-O-Matic: Note the compensator and its three bushings.
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