You can get a bolt from Bill Jenkins. I just bought 2.
With the ATX, when you install the new bold the exposed threads will be dangerously close to, or even have the tranny case resting on the bolt end. You may have to grind that exposed thread down a bit to prevent damage to the tranny case. If the tranny case is sagging & already very close to the existing bolt head, you may need to replace the driver side engine mount.
I spun my bolt into place (with new control arm in place) nice & tight, counted exposed threads, then removed the bolt again. I put tape around the bolt leaving the appropriate number of threads exposed & ground off the end. Easy. Beveled the end threads just a bit & re-installed for a nice clean look.
