sixtwenty

I'm new to Datsun trucks, with that being said here is the problem I am facing. I recently bought a 1980 Datsun 720. It is from Oregon and I live in California. I went to smog it and I was told they could not because of an exhaust leak. I searched for the exhaust leak and could not find it so I decided to change out the exhaust manifold gasket and the downpipe gasket. Today when I was cleaning out the exhaust manifold and intake manifold I noticed a pipe in each exhaust manifold runner and a tube connected to the collector of the manifold. As I was drying the whole thing with the air compressor I put the nozzle up to one of the pipes and it had rusted through. Does anyone know what this part is?? I looked it up in the manual and it was called Air Assist Galley. I have not been able to find it anywhere by that name, so if anyone else knows it by any other name or can help me find one I'd appreciate it. Thanks!! I'm not sure how to post pictures on here, so I can not post the picture at this time.

I am looking for a rebuilt L20b block or a rebuildable block. It is for a 1976 620. I am located in Central California If anyone has one let me know!! Thanks!!

Is this the complete wiring harness? Because I REALLY need one haha