4v 4.6 and transmission into '08.

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2008 4.0 5r55s (bad trans), Question is: Will a 4v 4.6 and trans from Mark viii (I already have this) bolt in with appropriate hard parts such as motor mounts/crossmember/driveshaft? I'll need pcm/ecm/computer etc. from both vehicles I assume? Strong mech. skills and equip. However, I am ignorant where the comps./wiring harness is concerned. Looking for information on this as a project.
 

Todd Z

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The DOHC is way too wide for a direct bolt in... lots of modifications. Now the electrical as you said would be another headache. Can it be done by the right person, where there is a will there is a way.
 

blksn8k

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Well, the concept Adrenalin from way back when was supposed to do pretty much the same thing, right? SVT planned to use a 4V 4.6L from a 2003-2004 Mustang Cobra including the supercharger. However, here's a photo of the concept's engine compartment:



If you look closely it sure looks like a lowly 2V 4.6L. The intake even says "4.6L SOHC". I guess they didn't have to open the hood on a show truck. I suppose it's also possible that it did have a 4V in it at one time but Ford probably couldn't sell it that way when they decided to get rid of it. My guess is it never had a 4V.

BTW, that concept truck sold for $55k last year at the Barrett-Jackson Fall Auction in Scottsdale and that's where the photo came from.

Wasn't there also a shop in the Carolinas that built a Sport Trac with a GT500 5.4L with 4V heads? Not sure if they ever got it running but I believe they eventually trashed that plan and went with a 5.0L Coyote instead.

Before I got rid of mine I thought about building a 5.3L stroker out of a 4.6L and using 3V heads. Ford Performance still sells a crate 5.3L shortblock that will accept any modular cylinder heads (2V, 3V or 4V). With 3V heads it would be a direct bolt-in since it uses the 4.6L block.

I would assume one of the biggest hurdles when trying to use 4V heads would be routing the exhaust. There's only so much room between the frame rails....
 

Todd Z

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I know the guy very well that purchased the truck and I thought it was about $80,000 that the truck sold for last year. Anyway it is a two valve 4.6. The truck was also butchered electronically and other mechanical items that were horrendous when he got the truck home.
 

blksn8k

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Here's the auction listing with the selling price of $55k. I suppose once you add in the bidder's and buyer's fees, shipping, taxes, etc. it might get close to $80k. Did your friend buy it at the B-J auction in Scottsdale or later?


I suppose all Ford needed it to do for show duty was be able to move from a trailer to a parking spot. The auction description says "**NOT STREET LEGAL** **SOLD ON BILL OF SALE**". I assume that means it didn't have a title?
 

Todd Z

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Yes. He bought it at BJA. It has non-DOT rated tires and other things on it that prevent it from being street legal.
 

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