Late in the 86 model year, the non-feedback carb was changed to the feedback carb. The intake manifolds may be different, the exhaust manifolds and secondary-air injection plumbing is way different. Intermixing the two may 'work' but if you have any emission tests to pass, your tech will fail your truck.


1987 Raider - Roxy
1988 Mighty Max 2.6L Turbo - Pearl
1997 Mountaineer V8 - Freddy
2000 Excursion V10 - Freya