i may not have gone 9s with my car.but years of seeing post of cars going in the 9s with 215-218 or smaller and the same combo i would think i am right in my statement.also talking to guys that have been doing it for years and building some of the quickest 109 tsm/street strip engines. i was told i would be best to use no more then a 218 so my car is still fun on the street.i talked to all the best before i pulled the trigger and you should do that also.if you have someone do the job make sure you tell them just what you need done or you might have a bill for a bunch of nonsense besides a cam install.