i have an h reg efi xr3i cab that i want to put my turbo engine in, i have mfi bottom end that i'll drill cps in, efi head and loom from car, do i need to get a ofac or ofab ecu to use on it? i heard the ofac will plug straight in and i'd just need to change fuel pump and injectors, any help would be great as i plan to do it this comming weekend