There is the electronic ignition upgrade. Crutch for the muffler, steering they add a thrust bearing(needle bearing style), put a wheel bearing in the top of the column, heim joints instead of the CC tie-rods.
Fancier tires- V61's front, ag tread rears.
Engine you can mill the head 0.040, port/polish and put a mild camshaft in it. Called a "cheater" camshaft.
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