Just one final note:
I have to make it absolutely and abundantly clear. I agree a turbo is a proven, time-tested method which adds significant power to the 2.3. I know. Some years ago a friend/tenant of mine went on vacation and left me the keys to his Merkur. Wow, what a blast it was to drive that thing. Hearing - and feeling - the turbo kick in was a thrill. But THAT kind of power is not my intention. Dont want to spend the money or the time. A modest increase is the goal at relatively low cost. And, if some new discovery is made along the way, then that's even better. This planned project will be done with backyard DIYers (like myself) in mind, not career Motorheads.