I just rebuilt a 1994 4.0 ranger V6 Pistons 20 over everything is brand new mother had 270,000 miles the only thing I hadn't replaced are the fuel injectors since the Pistons are 20 over should I go with stock injectors or a higher performance injectors.

Any idea what one should do?

 

Welcome to the forum

Stock injectors are fine to use, even with bigger cams

Injectors are not the same as Jets in a carburetor, the computer is programed for the amount of fuel the stock injectors can pass at 30psi pressure(1994), this allows it to calculate injector open times accurately
Larger injectors will just get you RICH codes, because injectors are passing more fuel that computer calculated for, and no extra power