I too like the wheels and also agree with your comments regarding 4 lugs with 5 spoke wheels...
I was able to go with a center cap with the 3" studs on my 31 spline Moser axles. I have 96 Cobra replica wheels for 4 lugs with the Mustang center caps. They fit over the studs. These wheels in a chrome finish would look great on your black car and cover up your 4 lugs...just a thought...
Check out my pics in my signature...the car has been lowered since these pics but it gives you an idea anyways...
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fordgasm
CLICK HERE to see my 87 GT