ok here is what i got the 1998 5.4 and 1998 4.6 for me to go to the 5.4 from 4.6 i got 5.4 wire harness 5.4 comp trans and 5.4 engine i am ready to swap from the 4.6 ok i take 4.6 trans engine comp wire harness out and replace it with 5.4 wire harness trans engine and comp am i leaving anything out will i have to have the dash wire harness also i mean if the 5.4 was a 1998 model f150 just like mine i guess my question is will i have to swap the dash wire harness also its a tight super bowl game getting good got more beers to drink i need all yalls help

 

You could have just put the 5.4 in and used the 4.6 harness with coil packs. A tune would have dialed it in. And if you would have got a 99+up PI 5.4L, it would put out more power as the 98 was a non PI 5.4L. But since you have it, would still be a little bump from the 4.6.

 

oh i havent paid for it i just found it but i was going to get it tomarro evening so maybe i will ask for the 1999 5.4 or 2000 i am just trying to make it simple as possible so will i have to have the wire harness from the dash to go along with what i have already

 

User JMC has detaild note linked from his signature
Here https://www.f150online.com/forums/ar...ml#post3570245

 

 

i have all the info i need now i just have to get the comp,wire harness and 5.4 engine with torque con i will use my old trans and get 2 inch shackles i am no pro i will never know it all and i will be the first to tell you i am not a typing guru like others claim to be i can use advice and mistakes others have made to my advantage i dont take bragging about my truck to the extreme and i will not try to answer a question or get involved in someone elses convo with off the wall ignorant answers especially when i dont belong there