I'm in need of a motor, but my question is what 4.6/5.4 will fit in my car. Meaning, what engines will bolt in without much modification. I need to know for instance will a 4.6 short block of a crown vic from such and such years, bolt in and work fine. Or a 5.4 F-150 blah, blah years work. I have a t45 for a trans and I'd like to keep the ported, polished heads and the rest of the mods. I just need to replace the shortblock. And if I was buying a short block I'd prefer a 5.4, but would it bolt up to my transmission. Would I need to buy the wire harness and other accessories.