Home First Gen Mustang 1971 Ford Mustang 1971 Ford Mustang Tune-up Information Maintenance Schedule Tune-up Specifications Year Engine Spark Plugs Distributor Timingº IntakeValve opens Fuel pump press Idle speed Cyl cid HP Type Gap Dwell Gap Man A/T Man A/t 1971 6-250 145 BRF-82 .034 36 .027/.025 6B 6B 10 4-6 750 600 8-302 210 BRF-42 .034 27 .021 6B 6B 16 4-6 800/500 575 8-351C 240 ARF-42 .034 27 .021 6B 6B 12 5-7 700/500 600 8-351W 240 BRF-42 .034 27 .021 6B 6B 12 5-7 700/500 575 8-351CJ 280 ARF-42 .034 27 .021 6B 6B 18 5.7 800/500 600 8-351 300 ARF-32 .034 27/29 .021/.017 6B 6B 18 4.5-5.5 800 590 8-302 370 ARF-42 .034 28 .020 10B 10B 40.5 4.5-6.5 650/500 700/500 Capacities No Subscription? You’re missing out Get immediate ad-free access to all our premium content. Get Started Already a Member? Sign in to your account here.