Your model would be a cutaway chassis vs van chassis but I don't think that matters for Bilstein shocks. I used Bilstein part # 24-024808 for the front shocks and 24-221948 for the rear shocks on my 1997 van.
If the Ka-Bang you feel/hear is from the front then new springs are probably needed. Here are two photos, before & after new front springs:
First photo shows that my van front was hitting the bump stop and it's hard rubber on our older series van. (log in to see photos)
Second photo shows greatly increased clearance with new springs installed.
The Moog 81012 coil spring might be OK for your van. I used the 1" longer 81008 but wonder if it might be too much for your van with the shorter wheelbase cutaway chassis. Here's some info on fronts springs: https://www.classbforum.com/forums/f...ings-4136.html
- it's a tough choice between increased height and stiff (wire diameter) vs a bit softer. If you raise the front then rear air bags are a good option as you can adjust the pressure to level the van.