I did the gen 2 caliper swap, never had an issue with using gen 1 rotors. I agree gen 2 are better option but like I said never had an issue. My gen 1 rotors where brand new so never changed em. I also replaced the master cylinder for bigger diameter and the booster for the duel diaphram. Just a thought that you may want to also look into the booster and master. The other upgrade I felt was worth while was the rear springs and then just crank the gen1 torsion bars a bit to match, with a 2in body lift made my 33's fit well with enough room but not too much. The gen2 UCA's are nice for the upper ball joint, and allow half shaft angles to ease up a bit but I have had no issues with boots or joint issues. Not to high jack your thread but if you swap the torsion bars (gen1 for gen2) do you also need the LCA's or will the bars still bolt on the gen 1 LCA's?