I think I found the correct part.
Vortech Pulley Bolts 8R101-002
https://www.summitracing.com/parts/v...-002/overview/
Fastener Material: Steel
Fastener Finish: Gold iridited
Fastener Head Style: Hex head
Thread Size: 3/8-24 in. RH
Underhead Length (in): 1.250 in.
Can anyone confirm this or tell me it's wrong?
I may try to drive out to Summit racing to pick this up after work.