Coolant leak help

Hi all,

I am relatively new to the classic mopar scene and working on old cars in general. I just recently bought a 68 barracuda with a 318 (bored +0.010" over). The car had been sitting outside for an unkown amount of years. When I first got it I checked the oil dipstick and it looked fine, was dark brown and full. I managed to get the engine running and it sounded like it was running fine. I never ran the engine for more than roughly 5 mins.

Recently I checked the oil and it was milky, so I drained it all out. I have taken off the heads thinking it was a blown head gasket but they looked fine. The intake manifold gaskets looked pretty rough though. Can that cause a coolant leak into the engine? I have not taken off anything but the heads, so it could be something else. Any advice?

Also, is there anything I need to do after replacing the gaskets? Like flush the rad?

Thanks in advance,
Austin