Porsche Gt 3 Track wheels on my 65 Dart

So a friend of mine races a twin turbo Porsche and keeps having issues breaking the wheel centers out under hard acceleration. So we were bullshitting one day and decided to open up the lug holes to see if the Dart could tuck the wheels. With a bit more offset(approx 1.5 inches) they will clear springs and outer wheel wells. These tires are equivalent to 345's