I can't add to the pro or cons. I have never tried radials on my '67 C20, mainly because it sports 17.5s from the factory. On cold mornings those nylon bias plys sure do thump until driven a mile or two. Helps wake me up! 
Joe
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'67 Chevy C20 fleetside, 250 inline, 3 on tree, heavy duty clutch and brakes, heater, steel bed floor
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"Tighten until the stud snaps, then back off half a turn."
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