I must be a lazy old shade tree mechanic. My 410 stroker leaked and after two seals. I wasn't going to pull the engine to fix it. TTI W2 headers and a Milodon pan make dropping the pan cruel and unusual punishment, at least for this 70 year old. As a last resort I put in a quart of Lucas stop leak. Guess what No leaks. I ran it at Topgun and everything checks OK without pulling ther pan. We will find out next Spring when I change oil.