Engine Exhaust Manifold Studs

[Harley48]

Does anyone know where to source or what size the exhaust manifold studs are that connect the y-pipe on a ‘79 AMC 304 ci?

 

[CJ]

Not something I can recommend. If I remember it's ,3/8 x13

 

[CJ]

Now that I think about it, it is 3/8 24
It is a 3/8 studd.

 

[Harley48]

Now that I think about it, it is 3/8 24
It is a 3/8 studd.

Thanks! I ended up pulling both manifolds and ordering new ones, they were in worse shape than I thought