serious HP in the 2.3 is along the lines of nar 200 at the crank and pushing 8500 rpm. Its a scary engine and usuall they EAT cams. Durations are stupid excessive and still a flat tapet.
yes, I plan to put something just shy of this together ;)
The turbo head has no real advantage to it. It is a D-port just like the others in the line up. However, stay away unless they have magged the head prior since the heat will crack them around the valves. If you spend 14 days porting its iron baby you can cut it out to a oval port ad get some decent numbers on them. The Old Rangers had a circle port and can supposedly make better numbers with.
Though if you have a few hundred bucks, call esslinger and get their SVO head. Its a all aluminum d-port head that has much more capability in it. Just check in the EP guide to make sure that is legal, it is in CP, but EP is a little different in that regard.