nitrous setup help

No, you still need to know how it works, and what needs to be in place to make that happen. The return in not needed, but it doesnt hurt either. I ran a 175hp single plate for years witha stock 5/16 line and stock mechanical pump. But, I ran low pressures (3-4psi with the solenoid open) and changed the fuel jet to keep the mix decent. With old stuff, you have to tune the cars. The efi wont do it for you. So, YOU have to set teh timing curve. YOU have to jet the carb. YOU have to get everything plumbed right. You have to make adjustments. New cars, the basic system is a dry system that the factory ECM enrichens. Any idiot can do that. Well, some idiots from what I've run accross...lol.