350 to 370 fuel delivery
 

I am wondering how much of the fuel delivery system is compatible with the 370 coming from the 350.

Can I use my cosworth rails? Injectors?

injectors will work but I doubt the rails will fit coming from a DE

No the fuel rails, fuel pump and lines to the fuel rails are all different

^^ Injectors are compatible as they both use a 48x14mm injector body when the rails are at stock mounting height. This means that DW and ID injectors will swap back and forth.

DE/HR/VHR rails, all 3 are entirely different with zero compatibility.

350z/370z use entirely different fuel pump sending unit. Any return modification components installed to the sending unit will not be compatible.

The fuel pump itself will be compatible, however you will need a CJM fuel pump install kit (or one of its copies) to put any pump other than stock into the 370z sending unit.

Sweet. Great feedback guys. Exactly what I needed to know.

I have tried unplugging the sensors, and I have tried removing them, and dipping in a gasoline soaked rag. no difference in fueling at all. must be managed differently on HR cars