Diegokid The Richmonds are all around 3199.00. It depends on first gear ratio. I have both a richmond 6 spd when they first came out and had no rating of power on them. Richmond then listed the power rating, 450 for both. Under NORMAL drive this trans should last 100K miles. Abuse the crap out of it and the milage goes down like anything else. I race my car and went with a G-Force 5 spd semiclutchless, price was 6 grand with shifters. The rating on it was 1000 HP and torque. It's bullet proof. The richmond is IMO the same as the old Nash trans we raced in the 80's. The TKO's are beefed up car trans missions IMO. The Richmond is engineered better. There are only 2 main shafts, the gears are wider and stronger. I have rebuilt T-5's and T-56 trans. G-Force sell updated kits for the T-56 to blueprint it for 750+HP and Torque. I think they are working on a kit for the TKO 500 & 600. You Get what you pay for. I was just giving you my opinion on trans. Fluids are also something to look at. Cobras run hot under the car and some transmissions start getting hard shifting problem on long runs. If you are going to street drive and little to no abuse, TKO-600 is fine, if racing and hard abuse, you might want to save your money and go to a better product.
IMO Rick L.