[Mister Pontiac]

Originally Posted by skullbucket

He can't use polylocks with stock bottle neck studs can he?

He can, but will need 3/8” polylocks for the bottleneck studs.

When doing this, a situation can develop where a polylock bottoms on the bottleneck, but that’s no different than using the factory crimp nuts at that point. However, I don’t think any will bottom out, giving room for some adjustment. Either way, it’s a win over crimp nuts.

Ideally, you should replace the studs with 7/16” studs and use the 7/16” polylocks, but not necessary in a mild setup. That can also get into needing different rockers to go over the bigger studs, etc... depending on what you’re starting with. Cheaper, simple solution is to leave everything alone, and install 3/8” polylocks on the factory studs & rockers in lieu of crimp nuts.

Hope that helps.