what rpm

Ian the key to getting into 9's is 1st you have to be able run 1.30 in60 ft and those 391 wont cut it. engine needs to be able to go through lights at around 7600 rpm you need more diametor on tires so you can get bigger ft. print you need a roller cam that will let you acheive the rpm range and then there is air and fuel through carb. now i don't run my nitrus cause i don't like replacing engine parts.eventhough I have 210 shot on my car, once you get car around 10.20 . then give it a tast in3rd hopfuly it goes into 9's the 7600 rpms through traps means its still pulling slightley. and then there are trans isues revers manual valve body kevlar bands hopfuley your converter will stall at 5000/5400. your shifts will need to be on time and get rid of some weight.remember you are not a big block so its a lot harder and more costley go get im Gary