When I got my Dart , she ran like crap and was dumping a quart of oil, a quart of tranny fluid, 1/2 quart of p/s fluid and 1/2 gallon of coolant every week and had a nagging overheating issue and random electrical problems. I pulled the engine and transmission, replaced the seals and gaskets and while I had it out, replaced the water pump, thermostat and motor mount and tranny mount rubber bushings. Also replaced the PCV valve and breather cap filter. Had to replace the p/s pump and pressure line to stop those leaks. Overheating turned out to be the radiator so I replaced it too. Also did the ammeter and alternator bypass and installed a GM HEI ignition module which bypassed a lot of my electrical problems. Now she runs great and doesn't leak anymore. I'm far from an expert mechanic but a decent parts replacer and can follow other, smarter, people's directions. The people here are very patient and helpful if you'll listen. Before going to the expense and effort of rebuilding the engine, get what you have in the best condition possible, then evaluate the situation.
