3.8 to 4.6 - Mustang Evolution

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Old 04-16-2011, 11:23 AM   #1
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3.8 to 4.6

will a 1997 4.6 fit in a 2003?
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Old 04-18-2011, 11:50 AM   #2
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I don't see why not. Both the 96-98 and 99-04 gt had the sohc 4.6.
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Old 04-19-2011, 01:02 PM   #3
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Re: 3.8 to 4.6

As far as engine clearance/fitment, it will probably fit. You will need all wiring/electrical components as well as the ECU. Also is this engine mated to a manual or auto transmission, and what are you right now, manual or auto?

The 97 4.6L was SOHC, but it did not have the PI package: PI heads, more aggressive cam profiles and improved intake manifold.

The 96-97 4.6L's were rated at 215 hp and 285 tq.
The PI 99-04's were rated at 260 hp and 300-2 tq.

Honestly, with the 97 4.6, you wouldn't be that much ahead of a 99+ 3.8 regarding hp. The main advantage of the v8 is the torque and v8 sound.

If you can get the engine for next to nothing, it might be worth it...if not, I would say the swap would be more hassle than it's worth. Those years 4.6L's require quite much more effort to make power. Of course a +99 pi head swap would level the field...

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