FoaTech wrote:
I have needed odd quantities of ARP studs for unconventional projects and I just call them and tell them what I want and the send it. I had custom studs made years ago, like 1999. The company is top notch, expensive, but top notch. It is much easier now that the tuner crowd has been blowing up stuff and needed more metric stuff. When I started getting custom studs, they would put standard threads on the nut end because they didn't make metric nuts.
Anyway, just call them, they will work with you.
The 11x1.5 studs I have use 7/16-20 threads at the top end.
I'm not sure what the LS studs use at the top end. I had to call them about flywheel bolts as well. The cast cranks use 8mm flywheel bolts. The forged cranks use 11x1.5 flywheel bolts. Fortunately that's the same as LS engines. The automatic LS flexplate bolts are the right length for me to have my flywheel reworked for that length. If I build another one, I'd use the "adapter" flywheel bolts that are made for a flexplate + the LS to TH400 crank flange adapter.
The LS engines use 6 bolts, the Northstar uses 8. I'll have to ask about those as well.