OK, Pearl has 4-Bolt hubs, all around, that are drilled/tapped for lug bolts. I use the VW lug bolts at three positions and use a stud for the fourth position (keep reading). I mount Pelican 1-1/4" spacers with the lug bolts, and the stud position has a conical nut to tighten that one stud, so then the spacers are held on with a total of four fasteners - three bolts and one longer stud/nut. When I assemble everything, I used Locktite Red (HD) to make sure nothing is going to loosen up between the spacers and the hubs.
Once the 4-bolt stuff is tight, I then have four more studs in the billet spacer for the wheel, for a total of 5 studs (remember, that one longer stud is common to the 4-bolt pattern) which then fit the Porsche Fuchs rims. (the VW pattern is 4X130mm while the Porsche pattern is 5X130mm) The four studs in the spacer are also locktited in (again, Red HD Locktite) and then I use Porsche alloy lug nuts for the actual wheels. The final lug nuts are assembled dry - no Locktite.
Everything fits, everything works and nothing loosens up.
The studs are tightened into the hubs or spacer with two nuts locked together on the stud to run it in to it's working depth. The only worry you have with studs in the hub is to not thread them in more than 1/4" beyond the inner surface of the hub, otherwise, with drums they might catch on the shoe mechanism if the studs penetrate too deeply.
gn