The well-documented characteristics of the mighty 429-cubic-inch powerplant lurking under the hood of the Mustang Boss 429 do not need another deep dive. A quick synopsis should suffice before further exploring the short two-year production run of the most potent Mustang from the muscle car era.  NASCAR’s homologation rules required a limited production of at least 500 commercially available Boss 429 engines before race teams could use them for competition. The Boss 429 would have fit better in the
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