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The top speed it calculated was about 151mph for 2.59 and 132mph for 3.07 cars.
Nah, that's not right. Both auto and stick L98 are the same top speed according to all tests I've seen. beginning in 1985 they all did at least 150mph. My '85 3.07 rear auto has done 140 before and it had plenty of room left for more. I have only had my '90 up to 120 a couple times, but I know it will have no problem getting to 150 because it feels much stronger than my '85.