Brad have been build modified holley's for a long time. You might come up with many "carb shops" so make sure you are speaking to the one started by Brad Urban. Seems like Brad pass away a few years ago, I hope someone keeps up his great work.
Carburetor Shop
Brad Urban
8460 Red Oak St.
Rancho Cucamonga, CA 91730
909 - 947 - 9722
Fax 909 - 481 - 5822
Sorry, no website.
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