My 74 455 automatic is a Y9. May of 74 build date. These pics are from a year and a half ago.
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73 Formula. 9.1:1 400 .030" over, TRW forged pistons, hand ported 6X-4s milled to 85cc, Ferrea 2.11/1.77, Crower 68404 springs, 276°/284° 228°/236° @.050 .474"/.474" 112 LSA, Performer RPM, Shaker Tuned Qjet, Hooker 1.75" headers. TH400, Hughes GM25 converter. 4.10 gear for now. 1st Drive: 12/30/16. *SOLD*
74 Trans Am 455 AT Buccaneer Red
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