Ended up drilling out the stock bushings (recommended by
@Thomb ) and buying some of
these (recommended by
@Sputnik ). Drilling out the stock bushing was definitely the easiest solution as the local shop couldn't wrap their heads around wanting to modify the shocks and wanted to charge me a lot of money to press out the pins. Will be installing this weekend.
As far as getting the van up off the ground, the safest way to do this is to put the van on jack stands at the lift points just in front of the leaf springs, correct? I noticed that when using my stock hydraulic jack (placed under the rear axel) compared to when the van is sitting on the jack stands, the leaf springs have different tension. Jack stands certainly is safer overall, but is the tension on the shocks safe to remove from this point? This is the first time I've ever done something like this. Thank you.