1966-1977 Ford Bronco Engine - Stroking A Bronco
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File-fitting rings is a science unto itself. The rings were clearanced to specs at Speed-O-Motive on a power ring-filer, though low-cost manual ring filers are available from mail order suppliers for the do-it-yourselfer. Ring gaps were set to 0.018-inch, top, and 0.022-inch, second. View Related Article
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