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i recently got a 91 lincoln town car and im looking to buil the stock 4.6L motor. i know i need gears first and exhaust but i need to know what kinda CAI to order and if a set of 5.4 heads off a newer motor will be a direct replacement. and i know ima order cams and i need to know if a mustang upper and lower intake will fit also and if any has any advice it will be helpful and what size rear end i have to order gears for also and im also purchasing a zex throttle response nitrous kit for it also until i can get a supercharger or turbocharger but any advice will be helpfull
 

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1. If you buy the gears without a tuner, you are going to have shifting problems.
2. The heads will bolt right on. You can also use newer 4.6 heads as they are the same.
3. The mustang intake will fit but you will have to modify all of the vaccum lines, PCV hoses, and EGR system. You will also have to modify any CAI you buy as the Crown Vics intake tract is routed on the opposite side of the Mustangs.
 
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