With stock size tires and a .67 overdrive ratio(I'm pretty sure that's what a AOD's is) you will turn these RPMs at 65mph......
3.55----2029rpm
3.73----2132rpm
4.11----2349rpm
For performance I would go with the 4.11's
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1987 Buick T-type
1998 HD Electra Elide
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