Some already know, but I'll recap for those that don't. I had a few problems with the subframe. When I cut my tack welds loose the whole thing sprang out of shape. It turns out that the table I was using to weld my jig to wasn't strong enough and had deformed under the stress. What else is new.
The mounting arms for the A arms appeared to be straight and true, but the frame mounts were off by a fair amount. So break out the cut off wheels and start modifying.
I left the base intact to mount to the frame, but cut away the sides and fitted it to the chassis.
This is the new subframe in position. The A arms and wheels are mounted to check all the alignment specs. I'm currently using a 1/2" spacer behind my +42 wheels to allow room to go wider in the future.
crossmember v2.2 by
GySgtFrank, on Flickr
I'm still kicking around how to make it adjustable, but most likely it's going to get welded solid to the frame. I have to recheck (several more times) all of my measurements and readings before I do that though. I do NOT want to do this again.