[RICK LAKE]

Motorhead If you are not beating on the car, the 3550 will last for some time. The torque rating is about 375 ft for that trans. You are right about the tko600 has only been out of a couple of years. This is the one that was reengineered and not breaking 2nd gear or wouldn't shift issues. The 600 is rated for 600ft of torque at a peak load hit. Some guys are running them with 750ft. of torque and 800HP. Something have to do with luck and money. I have run and will stay with the Richmond trannies. I have the 6 spd and a G-Force 5 spd race trans, been happy with both. May change my rearend to a lower gearing from 3.31 to a 3.07. If a was to buy another trans and I might, it would be the super street richmond 5 spd with a 2.87 first gear. I like the overdrive also for cruising. My 6 spd will go in am TA that the orginial reason for buying it and having a motor that made over 500ft of torque. This trans still working great and shifts smooth. Save your money and get the TKO600. Brent Bylkins sells them at a great price along with other things you might need. Clutch if you are going from a toploader with larger spline to a 26 spline GM shaft trans or needing the shorter input shaft for the tko600. You need to look into this Brent has all the answers and parts you need. Rick L. Ps need a new bushing in the crank shaft also (pilot bushing or bearing) Output shaft may also be different. Check length of trans.