[RedBarchetta]

Do your Vintage wheel adapters use a spacer ring between the center adapter and the brake rotor? If yes, then eliminate the 1/2" spacer ring, cut down the wheel studs by the same amount and remount the wheel. You may have some minor clearance issues, which will necessitate machining the inner hubs a 1/4" around the circumference.

This mod works great on a Trigo set-up...look in my gallery and you can see what I'm talking about regarding the machining part. You gain an easy 1/2" this way and there should be enough meat on the inner hub of the wheel where the 1/4" less circumference won't matter and you won't be messing with the structural integrity of the rim. Measure twice and cut once. And of course, make sure you have 1/2" of clearance on the inside (wheel well, shocks, etc.). The SPFs have tons of room on the inside.

-Dean