If you've got questions, still, about the AlterK, register over at BigBlockDart.com; Bill runs the place over there as well, and frequently posts.
Maybe the suggestion is a bit late in the game, but I just got caught up on your build.
Looking to put the AlterK in myself (mine has the Willwoods).
Darren
Had to pull everything,pull the diff. to get the spacers out to run these new 1 piece axel bearings. Then get it all back together and installed again. Line everything up,measure,then measure again. Adjust,measure,ect... after it was all set I tacked it in.Moved it up and down,Checked it all again. Decided to weld it up. Adjusted the pinion again afterwards.Not much. Put the shocks on,Jacked it up.Measured,Adjusted the shocks,measured... This is how it sits on it's own weight. Everything looks aligned to me. Just wish I had those rear discs.Don't have the cash yet. Going to take the line tabs off the axel.Thinking of custom bending some for each side along the frame. Cleaning up the look.
This is my DH race bike. Custom suspension,And linkage. Custom shocks,tuning are nothing new to me.