TB keys question

[PAIRA90S]

If I want to drop my 90 Chevy K1500 to a more reasonable height what TB keys should I go with? I've got 2"blocks in back, I'm looking for 1" blocks to start, then no blocks. Depends on how the cv shafts look. Definately like it leveled as compared to the OEM "rake" my GMC has. I don't l now which it has now as it was lifted when I bought it. I've got them backed out to 3-4 threads between the key and adjusters. This pic doesn't look like it but there rwally are some threads thru the adjuster