bagging my squarebody 88 shopping list

Hey guys i have been looking over all the posts on here and finally have compiled a shopping list to completely bag my truck and still be able to tow anything. Let me know what you think and if I should change anything or add anything. I have never bagged anything before so this is my first. Here it goes:
1. VIAIR 480 DUAL PACK CHROME COMES WITH 2 RELAYS 399.95
2. 12 GAL TANK 99.99
3. 1/2" CHECK VALVE W/FITTINGS 28.99 (HOW MANY DO I NEED TO GET)
4. SWITCH BOX 29.99
5. TANK BRACKET 69.99
6. 4 SLAM SPECIALTIES XS 600PSI 149.99X4=599.96
7. GENERATION 3 BRIDGE KIT FOR SD.COM 259.99
8. DUAL PORT CUPS 64.99
9. 3"SPINDLES FRONT WESTERN CHASSIS 299.95/PAIR
10. TRI-ANGULATED 4-LINK FROM SD.COM 289.99
11. 1/2" AIR HO0SE (DOT) 50FT 29.99
12. MISC. FITTINGS

OK SO THATS WHAT I HAVE GOT SO FAR. PLEASE LET ME KNOW IF I AM MISSING ANYTHING OR CAN CHANGE OUT ANYTHING FOR SOMETHING ELSE.

the c-10 front brackets won't work on the dually. just found that out when I ordered the c-10 ones from ssd. had to build my own to get the bag centered in the lower control arm.

i was told they worked perfect, since they were the same spring pockets as the c10... maybe i got more bad data..

i would go with a re8 bag not the xs unless u hopping this save yourself some dough

with those upper plates, the bag sat on top of the side of the lower control arm, instead of in the spring pocket. I used them as a template to make the new ones and moved the bag mounting hole over an inch to make it work. all of the mounting holes for the frame were right, just not the bag.

right on...ill have to remember that when I get around to bagging the front of my dually