you dont technically NEED the airdog, but i would still put one on. the stocker is not the most efficient unit ever built. plus if u change injectors or do anything to the fuel system, it is a million times easier to prime the system. and the airdog can support more power. n we all know u can never have too much power haha. as for the block off plate, alot of diesel sites sell them, and i've heard a 350 small block block off plate will work just fine.
95 rclb 4x4, nv4500 swap, SB 3250 dual disc. AirDog150@40psi, no plate, 2095 rack plug, SDX 5x12's, 4k gsk, tork tek 060 OFV, 16.5* timing. Dtech 62/65/12, bhaf, 4"dp 5" single aussie. 4.5" BDS lift, 35" general grabberss, crossover steering