I've developed a nice sized coolant leak. I started her up today and she immediately leaked about 4oz of coolant on the spot. Seems to be coming from the front of the engine. My head gaskets were done 8,000 miles ago and they look fine. Along with that we did Valley Pan gaskets, crankshaft seal and since then she's been really tight. Any common leakage areas I should look into first.

My first hunch was throttle body gasket, but that's pretty high up on the engine and I imagine that woud cause a leak down the driver's side of the valve covers, right?

My leak seems to originate at the forward/lower part of the block behind one of the pulleys.

 

Water pump.
You need a new water pump.

 

I think the water pump is probably the issue but you should have the coolant system pressure tested to make sure.