Posted this question on the HAMB. I mocked up my rear with 3" lowering blocks, not low enough. With the blocks I have 9" between the top of the axle and the bottom of the frame. I am going to do a trangulated 4 link, and need to know how much clearance is needed between the axle and frame before I would C-notch the frame. If I C-notch, I might as well narrow it for wider tires. Need to find Dakota lowering spindles, maybe I should have Z'd the front end. Not much will be left of the original frame, should have started from scratch.