1998 Mustang 3.8 to 5.0 swap?

[Isaacg33]

I’ve got a 1998 mustang with a 3.8 in it the oil pump is going out as the car has 209,000 miles on it I was looking for all of the things I would need to swap it too a 5.0
K-member? Wiring? ECU?

 

[wmburns]

Here's some information to get you started:

https://www.allfordmustangs.com/forums/v6-tech/287072-v6-v8-swap-faq-newbies-read-here-first.html

The short answer to your question is: Yes, Yes, and Yes.

The successful people on the forums report transferring the entire wiring harness from a donor GT to get the job done.

For a 5.0 swap, other questions such as engine management need to be answered.

Try searching car-part.com to get an idea what's available in your area.

Also answer questions such as "will this car have to pass an ODB2 smog test"?

 

[Isaacg33]

Well I live in California would it even be able to pass smog?

 

[wmburns]

Here's the dirty little secrete of motor swaps. In locations that have an ODB2 smog test unless you transplant the entire wiring harness and PCM of a compatible car the PCM will never go ODB2 ready.

And there's the "visual inspection" part of the SMOG test. You would think that any mechanic worth their salt would notice that the motor installed doesn't match the VIN motor code.

 

[Isaacg33]

See that’s what I had thought as wel I was just going to buy something else and swap it to have some fun