Approximately how much horsepower and torque will come out of this build up combo:

mill head .075
port head
Hyper pak intake
split dual exhaust
390 or 400 cfm carb
still unsure of what cam to use??? will use it to drive daily and occasionally tow a small light weight trailer


All of this power will be transferred via a late model 904 (lock-up converter) going to a 3.23 rear. I can always come up with a earlier model that does not have the lock up converter. I own a 1977 Volare that I could just swap transmissions around. So would I be better off swapping it out now or acquire the components required to make this late model transmission work for this application?

I know these type questions become redundant, but I am just trying to make sure I choose the correct components. I want it to work right the first time.