After a lot of going back and forth with my carb which dumps fuel and my tranny with a stuck modulator I have come to the conclusion that I may be leaking coolant internally as my radiator level has dropped, still have white smoke and water droplets from the tailpipe. Plugs still look fine and I still have no water in the oil or oil in my water/coolant. Is there an easy way of telling which gasket(s) I may have blown? The motor, a 1970 396 was rebuilt not long ago and everything looks normal. I was going to drop in some of those AC/Delco coolant tabs as recommended by someone in my car club but I am not looking to band aid a serious problem even though I am not looking at the cost of having to possible do the head gasket(s). Smoke is the same out of both exhaust tips! Thanks in advance for opinions and/or ideas.