baha
+1y
1.
For kits check out the sites supporting vendors, most of them give you a discount.
Vendors
Modplant.com
here is the link on modplant's site for the front kit.
Sadistic Iron Werks
Guilty By Design
Also our advertiser Illusive Fab carries the kits.
2. no you need to remove the torsion bars
3. I've never used their bags but others should be able to chime in. I have had great experiences with Slam Specialties bags, universal air, and Firestone. It's mostly preference but some bags do offer great benefits like the newer Slam Specialties SS Bags.
4. Single port is plenty for most people, most people forget even in a dual port bag unless you run a separate line for each port you won't see a noticeable increase in speed if at all.
5 or 6s front 7s back, 8s are for full size trucks.
I hope this helps some I know other guys will chime in with good info as well.