Although I never broke a 1/2" stud, I upgraded to 5/8 when I put the 540 in. By the time you add up the cost of the broken stud, possible wheel, axle, quarter panel, and paint damage, I wasn't taking any chances.

[image]http://s1126.photobucket.com/user/nhramark1/library/Racing[/image] 9.100 @ 150 mph 5.780 @ 120 mph