Tell me about it! When I saw the first photo of your car in this thread, I thought - hey, that's my car... wait a minute, I don't have those wheels on my car! Nice ride you've got there, BTW. I'm kind of surprised those "R" wheels fit as well as they do, I really like them but always passed because I thought they'd rub.
FWIW, my combo is:
Front
73+ K-member, LCA's, UCA's & spindles (drum type for AndyF's Viper caliper kit)
11.75 cop rotors, afore-mentioned Viper calipers
1" ADDCO sway bar
1.14" t-bars, poly everywhere
Rear
ESPO 6-leaf HD repro springs at stock ride height
AndyF's adjustable front hanger (lowered position)
Prothane adjustable rear hanger (zero drop)
65-67 B-body rear axle w/74 Dart 10x2.5" drums
Wheels are 95 Cobra 17x8" +5.72" wheels (hub bores opened to Mopar hub-centric), with no spacers front or rear. Shocks are QA1 Stocker Star aluminum adjustables, front & rear, too.
Tires are 245/45-17 Kumho MX street/autoX stickies
If I can't sort out some decent 18" wheels with the offset I need, I'm about 90% convinced that I'm just going to run 275/40's on my 17's front and rear - looks like it will fit just fine:
Clair