Coolant Leak

[DipStick82]

Howdy fellas,

So I seem to have a coolant leak in my 71' C10 Custom with a Good Wrench 350. I've been noticing leaks on the ground and pooling in the pan below my radiator--more leaking after longer periods of driving and overnight after driving home from work--at time it will nearly deplete the radiator reservoir of coolant. After a recent depletion I filled the radiator only to find a large pool on the ground after the first drive.

The next day or so I found coolant on the top of the block (picture attached). I am hoping this was just a hose leak and not a gasket. Is it possible that the gasket show in the photo is leaking?

I'd like to start trouble shooting this but don't know exactly where to start...

Any insights are much appreciated.

Thanks!
Kelley