["Me"]

My wife and I were talking last night and the idea of a round the country tour with the 65 we are building right now was discussed, and sounds like fun. So.... My question is with a 9.5:1 389 tripower what can I squeeze out of it for milage? It curently has a th400, but I am seriously looking at a tko conversion. Rear gears can be changed to whatever is optimum for the tko, opinions on optimum? The motor is out and being gone thru now so changes could be made there also.
Also, I am going to add aftermarket air, who's kit is considered the best?

Thanks tons, Larry