You may also find some help at the TorkTech website. The have been providing PD blower kits for 4.6 and 5.4 engines for many years. The kits appear well thought out and well made. Worth a look, just in case they have something that is useful / helpful for your project. IRRC they provide 2 and 3 valve kits for 4.6L & 5.4L engines.