by Mark Nixon » Wed Jan 02, 2013 5:23 pm
I've never fully investigated the Dodge van lower arms.
I do know that the dually style lower arms from the '70s to mid-'80s vans AND dually trucks interchange up to January 3 of 1991.
After that date the radius (or strut) rod bolts ON THE PICK-UPS were a bigger diameter, 9/16" late, 1/2" early.
A lot of information is on the door tag under "GWR front" or "GWR rear" .
A dual rear wheel (drop center, "Budd" wheel) is usually rated at 4,000 pounds across the board, van or truck, but there are some 3300 pound and 3600 pound ratings, I am not sure if they are for SRW or DRW.
If I'm not sure and I'm researching interchanges, I go to Car-Part.com and play around with the applications there, it's not dead nuts accurate, but it's gotten me pointed in the right direction more than once since I've used it.
The easy answer is that anything with a DRW is the same lower control arm, the strut rod bolt hole size, notwithstanding.
Mark.