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The 4x4 block is actually 1 1/2" rise. The difference from a 4x2 (1/2 ton) truck is the block. *Stock 4x4 shock is +2" *Remove block = stock 4x2 shock *-4" = same How's your head? Leakage? I don't know. Never read that anywhere but, as mentioned, they have a lifetime warranty.

34023 rears are perfect height for my 4x4 -4" shackle w/block removed. I didn't order the fronts yet because I wanted to see if the rear would go up or down with these, first. It did settle down slightly and is now totally level with no rake. It also rides 10x smoother compared to the stocks being compressed all the time. Now the (stock) fronts feel too stiff.

Thanks for all the info guys. Based on this, I'm ordering: EDL-33024 front (Tahoe/Suburban/Avalanche 2wd/4wd) EDL-34023 Rears (For 99-2005 2WD 1500s Lowered 4" in the Rear) My 4x4 is lowered w/2" spindles and cranked down 2" more up front; 4" drop shackle -2" 4x4 block spacer. The load up front of my CC is more like that of an SUV and a 2wd rear just has less travel, not less capacity. A half ton is a half ton. If tow/haul ever becomes an issue I'll just slap in helper bags. Thanks again!

I only dropped 5' IAT on a 100 dry shot at 900psi. You can also play around with nozzle direction/distance relative to the MAF to influence A/F. It's better to let the MAF go a little rich anyway to avoid KR and sacrifice power while spraying. I'm just running 4' less timing all the time now while NA + the colder TR6's. Overall, my mpg has increased 10%, there's no knock and no concerns of detonation, just playing it safe. And yeah, superchargers with nitrous are a lethal combination. Make sure the heads are torqued down!

I'm now at 24' with a 100 dry shot and A/F at 12 w/no KR.