The factory LT1 hub bolt feels like its trying to make it's own threads, does anyone know what thread size and pitch it is?

 

That doesn't sound good

-Dustin-

 

Did those of you with aftermarket cranks use the factory 7/16" x 20tpi bolt?

 

Are the threads on your bolt in good shape?

 

Yes, they look fine. A buddy suggested that the bolt may have stretched, although it threads into the factory crank just fine.

7/16x20 appears to be a standard pitch on (almost?) all SBC applications. I'm going to buy a new bolt and see if it threads in ok.

 

Is it a problem with length? I have the Callies Stealth, and I VAGUELY remember an issue with the length of the bolt... but that was almost 10 years ago, and the shop that built the engine solved the problem while I was working in Italy.

 

The threads don't start until 1 inch deeper, so I need an inch longer bolt.