The wallace calculator says right now I turn 2730 rpms at 65 mph. With a .81 it would be 2200 rpms and with .68 it would be like 1850 rpms. At 75 mph its 2550 with .81 and 2140 rpms with .68. Either OD would be a nice improvement over what I have now. I guess something to think about.
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72 lemans,455 e-head, UD 255/263 solid flat,3.73 gears,,,10" 4400 converter,, 6.68 at 101.8 mph,,1.44 60 ft.2007
(cam 271/278 roller)9"CC.4.11gear 6.41 at 106.32 mph 1.42 60 ft.(2009) SOLD,SOLD
1970 GTO 455 4 speed #matching,, 3.31 posi.Stock manifolds. # 64 heads.A factory mint tuquoise ,69' judge stripe car. 8.64 @ 87.3 mph on slippery street tires.Bad 2.25 60ft.Owned since 86'
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