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S197 4.6 to 5.4 swap.


mrhobbz

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Does anyone have experience with this swap?

 

I'm looking at doing an MMR 5.4 short block from what I understand the deck height is taller.. I'm trying to figure out if I can run the Ford racing intake manifold for the 4.6 or if I need to run the 5.4 manifold. The stock heads appear to have the exact same part number between the two motors.

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You'll need a 5.4L specific intake manifold for sure, or at least spacers designed to retain the intake from the shorter deck engine. Though the heads may be the same they are positioned further apart because of the taller deck. I beleive Professional products makes some adapters for the 2V heads but I'm not sure if anyone's doing 3V. Reichard Racing maybe?
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Thanks for the input folks.. I think the truck manifold will clear the stock hood (it looks like the height profile is lower than the 4.6 manifold). Still weighing my options, may end up going with a 5.0 stroker instead
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