1.5625" seems about right. The subframe would allow for a little squeeze if the spacers end up a bit narrow. Here's one of my lateral links with the spacers fitted just off the lathe.
I'm moving my pickup points up by 1.5" also, so I'm using M14 bolts for all 4 of the inner pivots and ditching the cammed setup. The links are length adjustable, so toe and track setting will be a breeze.
I don't run a rear bar, so no need to add the endlink mount to the knuckle or trailing arm at this time.