Well, the 1988 lug nuts have shank diameter of .700"-.702", they fit tight in the wheels. Those Summit lags say shank diameter of .68"

I don't have the exact wheel hub centering stub diameter, but google says 73.8-74.X MM.

Something needs to center the wheels for high speed driving.

Conical lugs will do that of the lug studs are centered. A tight hub/wheel center interface will do that also.

Will .020" diff in lugnut shank diameter make difference on centering if the wheel hub is not almost a press fit onto the nub? I say probably not, though i would have to come up with something to fill the open centers of those summit lugs to be aesthetically pleasing.

Doug