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I am looking at a motor that has a casting code F1SE. That should mean 1991 T-bird. The motor has a carb manifold on it put on later. Other than manifolds-are there any other differences? Are these the same heads? Cam? etc. etc.
Thanks,
Erich
 

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The TBird engine will be the same as the 86-91 Crown Vic. That means it'll have the high-swirl heads like an 86 GT with cast pistons to match. The cam will be different than the H.O. Firing order will be 1-5-4-2-6-3-7-8.
 
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