Nice, that will work. I'm going from an open 2.45 to sure grip 3.55. I've never had mine on the road except for in and out of the garage in my driveway, so I really don't know what to expect. What A-body do you have?
Nice. When you do get a chance, that 355 gear set is perfect for fuel mileage and acceleration. I am working on a 73 Duster. 318 3-speed 8.25. Soon to be a 340 4-gear. It was a 340 4 speed originally.
