The part # for the choke I bought was from Summit part # GPT-421441 - It required no mods. I fo not see it in the Summit catalog, but I am looking at me receipt - I paid 34.95 on 1/31/05. Here is a link to it - I would call Summit - it is a Barry Grant part and is made for the carb. Hope this helps.
http://vichubbard.com/shop/product.p...0&page=11&js=n
Bruce