It can be done with the stock 19lb injectors, with the FMU (supplied with the kit). Most FMU's have discs that are calibrated for 19lb injectors, so all you have to do is change the disc (its cheap).
yea thats probably a stretch. It might work, but why risk the engine. Toss on an FMU or get some bigger injectors and you'll be sure you have enough fuel.