I pulled the pan on my 302 the other day to fix a leak and found one of the 1/2" freeze plugs in the bottom of the pan. How big of a problem is this? It's been runin fine, good oil pressure, no weird noise, no smoke, doesn't over heat etc etc...As far as i can remember, there are only two or three plugs right? Behind the timing gear? I know how to fix it, just would like to know how long it can run like this before something bad happens. I dont even know how long it's been out.