Sorry, it took a while to get you the part #'s, but I didn't have internet at the house on my time off for Christmas.
If you don't want it to shift hard, don't buy the bigger pressure valve. It will still shift firm and don't use the better servos. Use the factory Grand National servos and it won't shift extra hard but firm.
The part#'s in the pictures are just what I had in stock, so they are not the ones you need, but I thought I'd post anyway incase others wanted a hard shift. They are sonnex, I usually run fairbanks servos, but they look like the same quality. They may actually be made by the same manufacture…who knows.