Well it worked.... for a while,Street driven 56 olds show car on street tires. Went to car show about 100 miles and got on it coming home.
Went bang on 2/3 shift and stopped moving. Tear down shows new heat treated input clutch shaft split/sheared/cracked. Splined end sheared off end of shaft,the next 1/4 inch of shaft in many pieces and a big crack running down the shaft past the sealing rings. I used to build these for a drag racer that launched with slicks under boost and never had a heat treated one fail. Do you think it was defective or is this mild 455 tripower on street tires in need of a $500 billet shaft input drum? I also noticed a slight discoloration on the overdrive clutches,I left OD stock since it wont be used except cruise on highway,should I get /make a thinner apply piston and add clutches? This thing is pretty heavy,owner may not have TV cable right but all other clutches and band look new.