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Old 09-17-2011, 07:20 PM   #5
FritzA
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Join Date: Jul 2009
Location: Denver Burbs, CO
Posts: 115
Re: 383 want bigger TBI

Check out the eBay store for extreme EFI They bore out the 350 tbi to 50mm from stock 44. Not only will it be bigger bores but it will also have better bushings for the butterfly shafts and some airflow mods too. They also sell the sbc manifold bored out to 50mm and gaskets to match.
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