According to the 1956 Thunderbird manual the 6 cyl. is a 223 cu.
in THE firing order is 1-5-3-6-2-4
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On a 1987 Ford Thunderbird :
firewall
3 - 6
2 - 5
1 - 4
front of vehicle
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There are five Thunderbirds in the International Rescue team: Thunderbird 1 (Scott Tracy), Thunderbird 2 (Virgil Tracy), Thunderbird 3 (Alan Tracy), Thunderbird 4 (Gordon Tracy), and Thunderbird 5 (John Tracy).
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Thunderbird 6 - 1968 is rated/received certificates of: