Mark Steitle wrote:

The stock late model LS1 throttle body is larger than the stock
Mustang.  It has one barrel and is as light, or lighter than the
Mustang.  I believe it is 70mm and can be bought very reasonable (< $50)
off of ebay.  They are used on the newer Chevy pickups.  Weight is about 3
lbs., including solenoids, etc. which are not needed.

Note: Attachment is from a 97-02 Corvette and although it is similar to the
LS1 unit it is not the same.  I imagine it would work as well but looks to
be a bit heavier.  See:
http://cgi.ebay.com/ebaymotors/aw-cgi/eBayISAPI.dll?ViewItem&item=601199226

 
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