Ok, I resealed the heads and now no leaks. I used brad penn break-in oil and its time to change that. I have ten quarts of mobil 1 15w-50 synthetic from a friend to use, or what I normally use is Valvoline VR1 20W-50 racing oil. Which should I use or does it matter. I prefer to stay with the Valvoline though. The engine will see track time. Thanks.