LS1 Swap - How To Swap A Gen III Into A '64-'72 A-Body Part II
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The Keisler A41 is similar to a 4L60E GM overdrive. Since we were using the stock LS1, we used the Stage 1 model with a 1,600-2,000-rpm lockup converter that is rated for no more than 450 lb-ft. The A41 is 30 percent overdriven, putting us at about 2,000 rpm at 70 mph. View Related Article
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