8 3/4 ring gear change for optimum low end performance

toolmanmike said

If you already "spin pretty good" going up in ratio will just aggravate that.

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Sorta yeah and sorta no. A car will spin the tired harder and longer with a 2.94 than it will with a 4.30. That is to say "IF" it can break them loose with the 2.94. It will also stop spinning quicker with the 4.30.