need help just bought a 66 chevy fleetside

[billy66]

I just bought my uncle's 66 chevy fleetside and I need help with info.the truck has been in the family for years.I know some history on the truck.the truck has a 230 with a three on the tree. i want to change it to a 5 speed and keep the 230. my first question is what transmission will bolt to the 230 and how much modifications do i have to do. second it's missing the tranny crossmember,so i need to what years will fit. it's going to be a challenge to get it back in shape, but i love a good challenge. if you can help it will be much appreciated. thanks
billy66