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  1. Transmission & Driveline
    I am getting ready to order a 572/620 and 4L85E to put in a 70 SS replica that I am building. This will be a street car, not a race car. GM recommends their 3000-3500 RPM stall converter for this engine, but I was wondering how the 2400-2800 RPM converter would work for this car. Anyone have...