98 Explorer 5.0 with GT40P heads complete with all brackets and pulleys. Going into a 64.5 Mustang. Using the serpentine belt system. Fox body bell housing and a V8 T5. Stroker kit in the 5.0 thinking either 331 or 347. Using these heads with a Holley Sniper or MSD EFI. What am I missing in my learning curve for this project?