Quote:
Originally Posted by MJN
Looks like the F60 option got you the heavy duty front springs (3 leaf, 2250 lbs vs the regular 2 leaf, 1650 lbs packs) and heavy duty front and rear shocks (for 1978)
Starting in '81 you could get the F60 option with or without the Z75 quad front shock option.
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I wonder if the heavy front springs 3 rather the 2 also gave the K5 a higher lift.