Paul,
1,690 lbs each gives you a total of 6,720 for all four tires. Check the
rear axle rating, it should be less that twice 1,690 or 3,360 lbs. Then
weigh the entire vehicle and add the tongue weight and passengers. If
this is less than the 6,720 you should be OK, but you will have to keep
the tires properly inflated for the load, not necessarly max pressure
but certainly less than the pressures on the door data plate. (Coker
should be able to give you weight ratings by inflation pressures to
use.) By the way, what is the recommended tire size on the data plate?
Bill Kerfoot
WBCCI #5223
1979 23' Safari
1973 Dodge W200 Powerwagon
1977 Lincoln Continental
Orange, CA