Looking good Panel!
I put in the rear IRS on my '66 a few weeks ago... Wow is it low! Too low really (I will probably get flamed for that thinking

).
In my case I just dropped the spring plates one spline to allow everything to line up close. First drama was that I did not want the CVs to pop (T2 ones) from too much angle. Second was that the shocks using the stock upper bus mounts and stock IRS lower mounts with early Bilstiens (for swing axle VWs) are just too short and limit how high I could set the car up.
Panel, what shocks did you previously use? I remember you mentioned that you used stock top mounts with regular shocks... I guess if it was lowered no big deal...?
I also have some / \ wheel issues at the moment, but I just need to go and get it on a rack to straighten it up. I am using the clamp style from Bus Boys as well.
... Problem now is that the front is way to high relative to the rear! Not cool at all. Needs addressed I am thinking with drop spindles good for 2.5", still need it lower though.
Also I need to work out the rear shock issue so I can raise it up in the rear.
Take Care,