Just went through the exact same thing. Best of luck.... Only solution I found was getting custom studs made. I searched for DAYS. Custom ones are an exact match to the originals but 3/8" longer in the non threaded area. expensive but couldn't find another correct option.

https://www.stovebolt.com/ubbthread...-wheel-issue-split-rims.html#Post1536670

EDIT- also these have all the right specs... But the picture is not correct in what you get anywhere even on Dormans website. The knurling is completely wrong. It will not connect with the hub flange, its a course knurl ours is like a fine knurling. I know thats not the correct way to say it but didnt know another way.

https://www.amazon.com/dp/B07VRSNCYV?psc=1&ref=ppx_yo2ov_dt_b_product_details

1965 Chevy C60 Grain Truck