NickMBroncoII1987
New Member
- Joined
- May 29, 2023
- Messages
- 26
- Reaction score
- 9
- Points
- 3
- Location
- Coffeyville KS
- Vehicle Year
- 1987
- Make / Model
- Ford Bronco II
- Transmission
- Manual
What year 4.0 v6 would work best in my 87 bronco II 5sp manual
Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.
Unfortunately, the first gen (83-88) are less than ideal swaps to the 4.0 because the wiring harness is so different. The 89-92 had a different harness (89/90 for the B2) and since the 4.0 started in that generation, it’s almost a plug and play swap. Not so much on the older ones. By no means impossible, but a lot of people either don’t like wiring or shouldn’t be touching wiring.I think I will just bite the bullet and replace the heads on my 2.9. I've already got plenty of rebuild parts on the way. I was hoping the 4.0 swap would be easy. Are there any complete write ups on the to-do's on the 4.0 swap 91-94 models
No performance cam out of the box, however I'm guessing yours is really worn. They were known for soft cams that eventually die.I'll be sticking with the 2.9. A few questions about the availability of parts...
Performance cam?
Newer style rocker arm setup?
@gazIm going to try and run the 2.8 pistons in the 2.9 motor with reground cam. A guy on here was telling me how to do this and now i cant find his messages. We assembled the rotating assembly the the bottom of the 2.8 pistons are hitting the crank... I assume i need to get the 2.8 rods as well? Or do i need to run a 2.8 crank?