Compared to the stock units these things are massive industrial strength family sized. Both shocks fit the same way. No clearance at the frame/spring, so at least the lugs are in sync.
I agree with Kevin re frame construction. That and the larger diameter spring combined to produce this problem.
I am not going to elongate the holes, as I would have to nearly file them all the way to the aft edge of the lugs just get the clearance I need. Currently, with the bolts installed the springs are actually bowed due to the contact with the frame. That's too much metal removal and would, I believe, seriously weaken the lugs.
Inverting them won't work. The current contact point is 3.5 inches (88mm/8.8cm) from the upper bolt hole center. Measuring up from the bottom mount stud center is also 3.5 inches (88mm/8.8cm)so the spring and spring boss normally on the bottom would also contact the frame at the same point on both sides.
Unless there is a truly viable option available I don't think I have a choice but to return them and for now stick with the stock shocks.
I'd be perfectly happy with a store credit (for other cool stuff) and since the shipping was free for the order that included them I have no problem paying shipping back to CMW.
Beautiful shocks! They just won't fit my particular C5.