273ci--a keeper in my 64 Dart GT 4-speed?

To all of you, who have given such detailed and informed advice, I am grateful. I will take delivery soon, and begin assessing what I have. Other things being equal, I tend to favor keeping, but upgrading, the 273--but then, depending on what I find, all the other options suggested above are still in play.

I'd like to be able to say when asked "it is the original engine", but that may prove a bridge too far. I read this thread several times a day, and am encouraged by all the high-quality support there is among the members/contributors here.

The only down side to this new project is that I should probably sell my Honda S2000 (read: "go-kart on steroids") to make room and generate a budget--not to mention to head off divorce papers!