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Can you replace your 2V Block with a 4V Block and still use your existing heads, cams,intake, and internals, headers and other things?
 

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The blocks are the same, but you timing cover bolts can be different sizes depending on what plant (Romeo/Windsor) the block came from.

Worst case is you would need a different timing cover.
 

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No such thing as aftermarket, but Ford did improve the 03 blocks over previous years.

Pretty much any Modular block will work.
 

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Ayrton said:
The blocks are the same, but you timing cover bolts can be different sizes depending on what plant (Romeo/Windsor) the block came from.

Worst case is you would need a different timing cover.
also water pump may be different but other than that there is no difference other than weight.

by the way the 03 cobra block is not aluminum its iron...
 

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electric01 said:

by the way the 03 cobra block is not aluminum its iron...
Never said it was, but regardless of iron/aluminium Ford improved the webbing and deck surfaces in 03.
 

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Do you know where you can get a good aftermarket 4V block?
I have one for sale. It was manufacted in 2000. It has been clean on honed. I'll try to have pics this weekend or early next week. Make me an offer.

[email protected]
 
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