Hi everyone, my '68 Tempest has the original 350 with an Edelbrock Pontiac Performance intake that was installed in the '80s. There is a coolant leak near the front of the intake manifold and back of the water pump. I installed a new water pump, thermostat, and gaskets, to no avail. Does this look like a candidate for a new intake gasket? Also, I've seen stuff on another forum about a donut-shaped gasket that should go into a recess on the intake. Does anyone know if this donut-shaped gasket is the small round gasket that comes with an intake gasket set?  I've included a couple of photos -- you can see how the coolant is kind of pooling in that area. Any guidance or help would be much appreciated! I am still learning and want to do this repair on my own.

Common issues on Pontiac V8 water pump to Manifold "O" ring gasket is likely failing.

You may have to reset with intake with new gaskets along with the "O" washer gasket to successfully eliminate this condition.