Manual valve body

My 64 Signet has a reverse manual push button 1962 big block 727 transmission with freewheeling first gear and was built as a race trans by Dynamic for the Signet, it's got a 3000 Dynamic convertor. It's been in my car since around 1990 and fits behind a small block roller cam 360. I am getting tired of pushing the buttons and I am getting tired of the slamming hammer like shifts, but it's fun to wind it up and drive :) At times I wish it worked by itself but it don't. I'll be 70 years old in November...