I maybe able to help, I have a 69 Pontaic Firebird 400 small block engine with a GM 400 Turbo transmission. I am wanting to sell the engine and trans. for what I have in it. The engine was rebuil in 2000 by a race engine shop in N.C. and has 25k miles on the engine and trans was built at the same time and are both in great running condition. You may be able to use the trans to replace yours. Contact me if you are interrested in price.