So I get home from my latest 7 month vacation and found that all five of our vehicles need work. The most important being my 01 ram that pulls the Mustang across the country every three years. The motor in it had what appeared to be a spent ring (wet test diagnosis) and I decided to cheat and replace it with a low-mileage used motor. Got one out to put the other in and "PING", I actually heard the head crack. Replaced both heads with aftermarket castings and started to blow some white smoke. Initially thought it was an intake gasket, so pulled and replaced it. No joy. All 8 cylinders are running between 141 and 150. Tested the coolant system with the bulb tester and no exhaust gases are found in the coolaant system. So hey, its got to be the exhaust that received some coolant 9oRight?). So I replaced the catalytic converter and still have white smoke. I'm at a loss as it doesnt seem to be using any coolant out of the radiator or overflow. Any suggestions would greatly help my chances on getting the Mustang back on the road. Before some super individual suggests it....I have posted on ram forums and received no ideas. This is probably the best of five forums I am part of and truly need some "out of the box" thinking at this point.