engine change

[Albert]

Can I swap my 4.2 out of my 99 f150 for a 5.4 from a 2000 f150

[RhinoZ24]

Yes, the engine compartment is the same size. However, this is going to take a lot of modification and money. I believe the transmissions were different between the 4.2 and 5.4. Not to mention most of the other components under the hood.

[Jersey_Joe]

Yes u can. Which tranny do u have? U have to get the computer too. Not just gonna b a blue to drop it in and turn the key ya know? If u don't have the compatible tranny. There is work to b done fer sure. engine tranny combo with ecu at a good junk yard should b bout 3200$.

[BFEB]

I'm pretty sure the tranny is the same. Just be sure to get the ECM with the 5.4. I'm guessing most of the wiring should match up.

[Raptor05121]

If you have an automatic 4R70W it will mate up, the M5OD-R2 does have the same bell housing, but the 5.4L will quickly kill the input shaft.