Concidering my cousin made 396rwhp with a stock shortblock, FTI ported AFR 165 heads, KB blowzilla with 6lbs of boost, FTI custom cam, and a stock style ported holley lower (systemax I which looks IDENTICLE to the stock lower, this is different than the systemax II), I see NO reason why you shouldn't blow your goal out of the water. He has since switched to a flowzilla inlet and a ported GT40 lower. I drove the car when he put this on and on drag radials, 3.55 gears, the ass end broke loose at approx 65-70-mph in 3rd gear. Now, add an additional 10lbs of boost, more cubes, bigger heads, etc and I see absolutely NO reason why you couldn't run WELL into the 11's even at 5000'. Most meth injections are boost PSI activated, not RPM. I do not know though if you could do it the other way, but honestly I have no idea why you'd want to since a KB acts just like a turbo in that it makes boost in relation to throttle input, not RPM. So you could be putting around at a lazy 2200 and come to a hill, the boost will come on very quickly under the new load and if you are spraying the meth/water I think you'd want it to come on then.