Ryan i have not looked into doing this but i have seen 6 lug d60 fronts, and the chrome locking hub fits through you 6 lug wheel, but it is the d60 hub body that tapers larger near the mounting surface so that the 8 lug wheel would be "hub centric"(hub centric is the way they index OE wheels on the hubs). You have to lathe out that taper and then re-drill for 6 lug. that is where i don't know what to do, i think some people swap rotors and such.
Hope that helps.
Take the hubs down to a maching shop or axle shop. They will chuck the hub up in a lathe and remove enough material from the outside so your wheel will fit through. Then they will weld up your 8 lug holes in the hub and redrill them for 6 lug. I don't know if they weld and redrill the rotor as well or if they use a different rotor.
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