[j persons]

About the only way to be sure of what you need is to knock one of the old studs out and measure the stud hole To get an accurate measurement, measure in an area that hasn't been deformed by the splines. ARP may be the only ones that are strong enough to use with wheel spacers or excessively offset wheels. Their thread tolerances are much tighter than most others, especially OEM studs.

 

[j persons]

If your front brakes are like the 2 piece rotors on my '69, these are the ARP wheel studs that worked for my car:

https://www.jegs.com/i/ARP/070/100-7707/10002/-1

They were actually a bit short for thick Weld Wheels so I switched to one piece front rotors that used more reasonably priced long wheel studs that worked with the Weld Wheels.

ebay is your friend
https://www.ebay.com/p/ARP-Auto-Racing-1007707/871563743?iid=161624588951&chn=ps