devingrey

I was wondering about the wiring harness. Do i use the 4.6 wiring harness or should i use the 5.4 wiring harness?. I looked all over the internet but no answer. This is my first engine swap so bare with me. Im trying to learn! Thanks!

1998Slow 'Stang

You can use the 4.6l harness I would assume.

Out of curiosity have you already purchased a 5.4 to swap in?

devingrey

Yeah i have the 5.4 already. I got it yesterday to be exact. I just been putting on the accesserious on it and the drive belt system. Okay so it would be easier to use the 4.6 wiring harness?

devingrey

Yeah i got a awesome deal on it. only paid 1200 for it. Complete engine just no powersteering pump or ac compressor which ill just take off on the 4.6 and put it on the 5.4. My 4.6 died locked up on me so i had no choice but to find a new engine.

1998Slow 'Stang

As long as your happy man, as far as the wiring it should work, your staying with the 2v type engine so it should be a plug and play, to my knowledge anyway

devingrey

**** well what if its a 4v???

devingrey

Im also having problems finding intakes for the 5.4l 4v. I cant find any boss 290s. Its like looking for bigfoot in the middle of the night in the desert.......

1998Slow 'Stang

I don't know what to tell you about intakes....I want to say I've heard that a navigator or aviator intake will clear but I really don't remember where I saw that or which one. Maybe try doing a google search on that?

As for the harness, it should work once you lengthen some wires and change the pigtail for the alternator....or at least that's how it worked with my 4.6 2v to 4.6 5v swap.

Z28KLR

Pretty sure you're gonna need a new hood. That 5.4 block has a taller deck height (by a couple inches) than a 4.6.

1998Slow 'Stang

I'd be inclined to believe this. I know most of the intakes for the 5.4 are what make it too tall. I think if you got a nice tall hood you would have a lot larger range of selection for intakes.