Spacers would be cheaper than new rims, but if you went to 16" rims you would fix the scraping. Just make sure the spacers are just enough to correct scraping issue. Too much spacer, and wheels stick out past fenders
, and can give you a wider track than the rear (unless you space rear too).
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1970 T1 W/MassIVe 2913cc RAT/?EFI? w/direct fire (very soon) and 915 trans
1962 SC 1776cc SP 944NA brakes, 993 wheels
VKG