First post, thanks for the add......I have a 2000 Expedition 4.6 XLT VIN 8th digit 6 Windsor with a non-pi engine/ heads. The only thing I am finding in stock for crate engines are the engines with the pi heads. Plenty of manufacturer options on those engines for Windsors and Romeos, but it seems no one has any of the NPI engines. Has anyone used their NPI intake, lower and upper, on a pi headed engine? If so, what were the complications, and how did you resolve the incompatibility of these two components? Having a reputable machine shop rebuild my engine has been a dead end. Not many are willing to do it, or they are five or six months out lead time.