What are the part differences between 3.8 and 4.2 - Mustang Evolution

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Old 11-14-2004, 04:20 AM   #1
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What are the part differences between 3.8 and 4.2

Other than crank and rods, do the blocks differ in any way? Are the rod and main caps, bolts and oil splash tray the same? Any other engine components different?
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Old 11-14-2004, 05:14 AM   #2
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blocks are identical. you can throw a 4.2 block in your 3.8 and just change the upper manifold so that it will clear the mustang hood.
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Old 11-14-2004, 06:55 AM   #3
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Old 11-14-2004, 12:23 PM   #4
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The 4.2 is identical, but it's equip'd with knock sensors. That's the only difference in the block that I know of. Depending on the year of your car, you'e going to need a difference flywheel, oil pan, oil pick-up tube, and balancer. Also the pistons are different.
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