i have a lq4 in a 77 nova and building a fuel system for it wondering what psi and volume is needed for it to run properaly

 

PSI is 58, the volume depends on what you are planning in doing to it power wise. 180-200 lph, basically a stock type pump for up to 500-550 crank horsepower or step up to a aftermarket 255 lph pump from an aftermarket vendor if you expect to have more now or in the future.