ok, so i just installed a ford racing long block in my 86 gt. 5spd. maf conversion, gt40 alum. hds. b303 cam, edlebrock rpm upper and lower, 24lb injecters. 255lph pump. 75mm maf, throttle boddy, ect. the problem is it is running lean. Ive tried turning up my fuel pressure, but dosent seem to help. cant find any air, vacum leaks, ect. the motor is rated at around 350 horse depending on intake ect. do i need to go to 30lb injectors or what? any ideas, suggestions? thanks.

 

I would say bigger injectors.

 

Check if you have lean codes showing by running a DIY KOEO/KOER/Cylinder Balance Self-Test first.

 

prob injectors how did you turn ur fuel pressure up i wuild like to learn how to do it cus wen my 5.0 H.O starts up it wont idle intill it gets pretty warm and sometime wont evan do it than cuild this be becouse the muffler wus cut off right after the cats

 

24 pound injectors are fine for what you have. Is the MAF calibrated correctly for the 24 pound injectors? I'd look for another reason than the injectors.