You don't give much context so here's some research:

Kwiki diffs - Kwiki
Includes tacos, burritos, grilled cheese on ... Can be broiled on a spit (rostizado), fried (frito), or in tacos. A special treat is fried necks (buches) ...
www.maztravel.com/kwiki/plugin/attachments/ Mazatlan/ind......

One other thing, have you ever heard of chicken neck tacos? I had heard about a place called Kentucky Fried Buches that serves tacos made from chicken necks,
http://www.ericrench.com/MEXICO/TIJUANA/NORTE/zonanorte.htm

Buches/Pork Stomach
http://www.vallartasupermarket.com/taqueria.htm

Take out Mexican in DE? - Mid-Atlantic - Chowhound
I live in the Newport/ New Castle area and am interested in ... lengua (tongue) and buches (pork stomach), in addition ... standard selection of tacos. ...
www.chowhound.com/topics/356888

Punto de vista de culturización - Mexicanos en California - TT: A ...
But of tacos and burritos--the converts to our special dishes often know very little. ... are carnitas (barbecued pork), buches (pig's stomach intestine), and ...
findarticles.com/p/articles/mi_m0FWK/is_2_24/ai_73325316

To Market, To Market... With San Diego Foodstuff: Northgate ...
... (pork blood sausage); carnitas; costilla de puerco (pork ribs); buches (pork stomach); pupusa de chicharron or de queso, a very greasy pancake-like item ...
www.sandiegofoodstuff.com/2007/06/northgate-gonzlez-market-...



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Note added at 33 mins (2008-04-01 21:06:01 GMT)
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While you’re across the line, check out Kentucky Fried Buches, an interesting, modest place that sells deep-fried chicken necks — yes, necks — and corn tortillas and cilantro and salsa, so you can make up your own chicken-neck tacos. (Buche usually refers to the stomach lining, but in chickens it refers to the neck.)
http://www.sandiegoreader.com/news/2008/jan/23/cover/