GT6 wheel studs

["Chris Kent Kantarjiev" <cak@parc.xerox.com>]

For those who are interested in upgrading their stock GT6 wheel studs,
it's not necessary to go to a Chevy part. The TR6 studs will fit just
fine, are 7/16 diameter instead of 3/8, and are available from the
usual sources. It's a slight improvement to machine the head diameter
down slightly to make a perfect fit, but not necessary if you don't
have the time/resources.