Bumper bolts

[B5blueGC]

I have seem lots of stainless bumper bolts for sale for my 70 Barracuda that are 3/8" x 16, but I have heard that the "proper" bolt is a "7/16" x 14. Tried to find details in the parts manual but no luck.

Can someone enlighten me as to what is correct?

 

[Vaanth]

The bumper bolt threads for the face bar on a 1970 Barracuda, and most other domestic Chrysler product cars from the 60s-80s, is 3/8" x 16. Dodge trucks can have 7/16" x 14 thread size and the head of the bolt is physically bigger.

The following image shows a comparison of the 3/8" x 16 and 7/16" x 14 bumper bolts: