does anyone know the stock psifor fuel pressure in an 88 na motor?... and if i were to have an fmu should i use what ration of fuel to boot should i use?

 

There is absolutely no reason to use a FMU on an NA engine. You need some pretty extreme engine mods to reach the limit of the stock NA fuel system. In fact the stock mixtures are conserivatively rich and there are small gains to be had from leaning them out.

But since you asked, base fuel pressure is 36-37psi.