Yes, I'm curious as well. I'm wanting to put rear disc on my 71 4-speed car and as anyone that has read this thread, I'm already educated on how the RightStuff kit works (or doesn't) with Buick 15" wheels without modifications. I'd really love to find out the Inline Tube works better though it looks identical to RightStuff in the pictures.
Sorry I haven't yet... The winter before was a busy one for me and this past winter my back didn't let me do much... It is going to get done this year, I'm sick of the drum brakes, I'll update as soon as I do, few more big shows this year than I'll do it... Thanks for wanting to know still...
Just a little info for anyone going the Wilwood route. ...as I found this out the trial and error way : ) - As mentioned in previous posts, in order to use the D52 front caliper, you have to use a spacer on your rotor - If you use the Dynapro rear disc with the parking brake, you have to use the low profile version as the regular version will not fit under the rallye rim