First off , Nice Truck.
I am in the same situation with my 84.
I have 16.5 Super Swampers also.
Your best bet is buy a set for street use.
Get away from the 16.5 tires and rims.
Just use those for offroad till you wear them out .
16.5 stuff is hard to find and Pricey if you do.
I tried to sell them at a swap meet one time
I could not even give them away
.
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The early bird gets the worm,
But the second mouse gets the cheese
84 Chevy K-20
63 Impala (my high school car)
http://67-72chevytrucks.com/vboard/s...Crew Cab Build