G-body rear axle brake line bolt

[83hurstguy]

Anybody have a factory bolt that attaches the distribution block of the flex line to the axle housing? I know the threads are 5/16 coarse, but I believe the unthreaded portion of the bolt has a larger diameter to located the block. Either that or my memory is failing me, as mine is missing.

Yes, I know I can use a standard bolt, but I just want to do it right if possible. Let me know if you have one to part with... thanks!