There's a guy on the Corral board that did the 5.4 swap in his GT a couple years ago. You might go there and ask around. But I wouldn't do it in a Cobra. The 5.4 wouldn't be up to the specs of the Cobra R (not Type R) in the first place and wouldn't be up even to the specs of the DOHC 4.6 Cobra motor. You'd be much better off staying with the DOHC 4.6 that's in the Cobra.
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1967 Mustang Coupe
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