NOS is the biggest HP gain for money spent of any Mod you could do PERIOD!! My 89 ran 13.30 at 102 on motor, with a 150HP Compucar Wet Kit the best it ran was an 11.92 at 114.70!
Does that answer your question? haha!
I'd limit the Jets to 100HP with stock head gaskets,hardware,fuel pump etc.. The stock pumps only flow 88lph which is pretty weak, if you decide on a kit get a 155 or 255lph Walbro with a colder heat range spark plug gapped under .040!
With a 100 shot I'd run about 8 degrees of timing too!