What's the application? If you currently have the 7/16-20 OE type studs, you might consider the Dorman 610-157 overlength replacement stud. It has a 2-1/8" under head length.
Otherwise there are several 1/2-20 and M12x1.5 options through both OE replacement and aftermarket avenues that are not as long as the "race" studs...or you can cut those down too like Frank suggested.
Tobin
KORE3
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