You can use your stock stamped upper & lower arms with the bag cup kit, the arms are just like the 1/2 ton truck arms. You won't get a bunch of drop though unless you do lots of modifications to the arms & spring pockets in the frame.
What we use a lot on the 88 - 98 Chevy trucks is Choppin' Block's tubular arms (instead of modifying the stock arms). We cut out the spring pocket, cut out the frame for tie rod clearance & cut & modify the frame for the lower arms to get all the travel possible. We cut the cups down to 2 1/2", weld a 5/8" bolt to the upper bag cup then use a washer & nut to keep it in place in the spring pocket threw the hole for the stock shocks.
Here's a 88 - 98 truck with Choppin' Block arms.