Help Me Sort This Out!!!!!.

[GUTTERS]

RIGHT EVERYBODY, I VE BEEN READING THE POST FOR WHEEL OFF SET ETC.
MY CAR IS A '66, STANDARD WIDTH FRONT BEAM WITH EARLY 944 NON TURBO FRONT HUBS AND BRAKES, FITTED ON TO STANDARD VW SPINDLES. THE REAR HAS BEEN CONVERTED TO IRS BY MY SELF, AND IS RUNNING EARLY 944 ADJUSTABLE SPRING PLATES, TORSION BARS AND ALLOY TRAILING ARMS PART NUMBERS OF WHICH ARE AS FOLLOWS :-

951.331.513.0R
951.331.514.0R

I WANT TO RUN GENUINE 17 INCH CUP TWO'S UNDER STOCK WINGS/FENDERS SO WHAT SORT OF OFFSET SHOULD I BE LOOKING FOR SO THEY FIT NICELY UNDER THEM, THE CAR IS SLIGHTLY LOWERED ABOUT 2 INCHES FRONT, ONE SPLINE ON THE REAR, CAR WILL ALSO BE RUNNING A TYPE 4 ENGINE WHEN I HAVE FINISHED BUILDING IT.
ANY HELP OR COMMENTS WOULD BE GOOD.
THANKS