The left most arrow indicates a leak from the valve cover gasket. It may be the bolts are just loose. However, replacement, if necessary is very straight forward. Recommend a gasket with a metal core which will maintain its shape. The other arrows and the blue circle are leaks from the intake manifold. Not unusual on a 351C. A gasket kit includes "S" shaped gaskets which sometimes seal, sometimes not. Some people prefer a bead of RTV instead of the gasket. Once again, not difficult to replace. Once advantage of the 351C design is the intake does not contain coolant so taking one off is fairly simple.
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