I just put 4.11's in my 68. I plan on going with the 2004R transmission. Properly set up, they will survive the torque of our '68 goats. It will lower the RPM at 60 mph by 1/3, or in our case 1000 RPM. It also has a steeper 1st gear so we will get off the line faster than our TM400's. It is the best of both worlds. My calculations with the 2004R, my 275x60x15 rear tires, and the 4.11 gears will put me at around 2000 RPM at 60 MPH.
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469 (455 + .060") with the Edelbrock RAIV cam, Ported 6X-8 heads with 1.77" exhaust valves, 100 cc's, "0" decked block for 9.3:1 static CR, Eagle 1.65:1 roller rockers, Edelbrock RPM manifold and Edelbrock 750 carb., 1.75" x 3.0" Hedman Headers, 2.5" flowmaster exhaust system with "H" pipe and Dynamax super turbo mufflers. 200-4R with a Continental converter, 3.07:1 12 Bolt Saf-T-Trac
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