BroncoII4x4.com

I agree that it sounds like TFI. pretty common. But could also be injectors, resistance goes up with temp.

Only pics I have at the moment. First one shows the bracket you need. There are actually 2.
The second is the camber bushing..the big castle but deal in front of the spring.

Did the kit you used come with drop brackets for the axle? Anything over 2 inches of lift they are a must. Also,you'll need camber bushings.
I have 5" on mine with 3 deg camber bushings,if I remember correctly.

You'll need to get camber bushings. Have to press out the ball joints to install.
Rock Auto sells them in varying degrees of adjustment.