'68 Dart with a 318 LA - Build Options

Can the OP be a bit more specific on how it runs now?

Could be any number of things affecting quality or performance.

Is there a guess or estimate of actual mileage?

...and perhaps the budget.
A couple of buddies of mine messed with it for awhile. One of them owns a body shop and they were playing with it before I had it brought down to me in Florida. I have a video clip that I can't seem to upload here but it shows it running pretty good after they changed the fluids and replaced all the fuel lines and the gas tank. It was idling smooth and sounded pretty good. They sent me pics of the sludge in the pan before they changed the oil and after seeing that, I still think a refresh is in order. I'm sure the carb needs rebuilt and they didn't do a lot of tuning on it. It says 74k on the odometer and I haven't found anything that indicates that's not original or that the odometer rolled over. It's original paint on it too and the build sheet was still under the back seat. It sat so long I think mice set up residence in it so all the carpet was thrown out and the front seat upholstery is shot. I have not really determined a budget for the whole project but as for the engine, I wanted to pull it to clean up the engine bay and the engine. The engine could use paint but I'm not going to paint an old engine. That's where the refresh idea started to take root. Then I decided since I can't really afford to make it a 340 4 speed car that I'd just go low budget but solid and reliable. If a magnum swap is cheaper, then that's the route I'll go. The whole plan is still kind of fluid. I do have a pair of quarter skins (probably only need part of those) and trunk drop offs that I need to install and I think I'll also need to buy outer rear wheel housings and probably outer rockers.