8 3/4 SBP Wheel Studs

It looks like dorman says the stock replacement is 610-156, 1.5" oal, with a 472 knurl. I couldn't find anything with a smaller knurl, but 610-259 is a 1/4" longer, but a .475 knurl. I couldn't find any race length studs even close to your .466 knurl.
Maybe a little belt sanding of the Chevy part could make it work. I don't know if a 1/4" longer would help enough to make it worth while.