This is what all gear heads say. After the extended warranty expired on my '89 Mustang I thought 8psi from a Kenny Bell 1.6L blower on a stock 5.0L would be plenty of power. A few years later and I was running 16psi on a stock short block with Blowzilla/Flowzilla manifolds on a 2.2L KB blower, ported/rebuilt GT40-X heads and lower intake, 42lb injectors and a completely modified fuel system, a reworked exhaust system, a water injection system, a Tweecer and J&S Safeguard, a Spec Stage 3 clutch and a Viper spec T56 transmission. After doing all this Ford came out with the 2003 Terminator Mustang that was faster than mine, cost less overall, had far better creature comforts and could be had with a 100k bumper to bumper warranty! This is when I stopped dumping money into the '89.