My old 4:10 AOD(No convertor) 3600 lb Cougar 14.2@97 on 14" street tires. 2250@60 mph. You can use the calc. here to figure rpm's out.
I would recomend 4:10 for U, but if rpm's concern you that much get 3:73.
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82 Mercury Capri 302, Comp. Cams, Tremec 3550, 3.73's, 12.8@106 N/A
Kevin's Capri
Kevin's Mustang