Im posting here to get more feedback did searches in the 1st Gen forum but no luck no flamy. Heres the workings 71 K5 w/ shackle flip & 56" 4"lift tc ez ride springs @ rear netting almost 8" lift, Im commited to alcan for new front springs w/military wrap. Im thinking of getting 52" set w/ 4" lift to net me close to 8" of total lift.I already got cross over & turd towers w/14" travel billstiens. If 1st Gen front springs measure 45" (ive confirmed) & 2nd Gen 47" & the center pins are centered between eyes where do I want them to put center pins on the new springs? problem: I can't move the shakle location because of the location of the outrigger for my cage so i was thinking of moving the spring mount forward 6"-7". I can make this work due to my bumper design. Im thinking that if a stock 45" leaf springs has 22- 1/2" from eye to center pin than the new spring center pin should be 24-1/2" from the shackle location forward (for full stuff & clearance to firewall) which gives me more spring in front of the axle apprx.27-1/2". I also think ill need either 6" or 7-1/4 shackles. Please break it down for me if this doesnt make sense, thanks for all your input.