Originally posted by justins71 Dear god man... Vortech 12:1 with 550cc's? a 12:1 with stock inj is perfect up to 8psi, you'll need a different controller and a 1:1 for the 550's. I agree that it looks like you just took some combinations from other tuners and threw them together without knowing what goes behind them. You don't need the MSD coil either. Maybe a DIS-2, but the MSD coil's been tested to be almost identical output to the stock unit. like foggy said, you don't need the fuel rail unless you absolutely want one. not totally bashin ya, I just fear for your engine... Unless someone else is doin all the work!