I'm rebuilding a Th350 for my B&M 250 supercharged small block 73 Laguna. I'm wondering if I should be using one of those 36 element sprag & drum kits to beef things up. I had the motor dynoed at about 500 lbs of torque/ 545 hp approx. and think this maybe at the threshold of even a hardened outer race I planned to use. I have found a kit for $260 from BTE Racing and am thinking of getting it. Any opinion on this...can I get away with the hardened outer race piece?