My wheels are OZwheels but I supplied them with Pin drive adapters I got from Superformance and they machined the centers to fit.
I agree with you Mando, the 18" rims on 17" centers look good. The angled step rather than rounded from the center to the rim looks much better.
I probably could have added another 1/2" of dish on the front but I don't like the look where the edge of the tyre is right near the lip of the guard. I like the tyres to tuck in and not rub anywhere.
As for the difference between the Harrison and CR front end, they are probably both built with different suspension pickup locations. The CR runs a wider front with a lot of offset on the wheels to reduce the scuff radius.
Someone here may have a picture of a Harrison front wheel.
Cheers