Ok, here's the skinny...I have the 14" KS code rally ii wheels apparently from a 69. I have uploaded a photo on my link (someone tell me how to just add one to the thread reply please!!!) showing the minor issue. The tabs on the bracket marked 1 and 2 were slighly out of "square". I bent the upper one straight ant it ceased rubbing on the secondary ridge on the inside of the wheel. I left the lower one unbent for the photo (you can see the angle "A" plus where it rubbed.) When I bent it square the wheel turned fine with about 1/8 inch clearance.
I will take my grinder to the end and give it a slight touch and should gain another 1/16 to 1/8 clearance min.
Not sure what the inside of yours look like but if you want me to further measure the offset of the ridge I can do so, but likely my procedure in straigtening the brackets should do it.
They originally sent me the small diameter deep booster (assume it to be a vette booster?) I wanted the delco style of course.