I have an oil leak that appears to be coming from the front of the engine. where would it most likely be from?

1973 buick 455. fuel pump, valve covers, oil pan.I have an oil leak that appears to be coming from the front of the engine. where would it most likely be from?
Back then they used a lot of cork gasket material and mechanics tended to over torque them causing them to crush. The valve cover is the most common of these areas. Another area is the fuel pump its self, internally the diaphragm would develop a small tear and leak from the weep hole in the side. This is usually very hard to find, duct tape over the hole and if the leak stops for a day, you have found your leak. Where the timing cover meets the oil pan is another area that is prone to leaks. Silicone has been used to prevent this problem, but sooner or later it too looses its seal and begins to leak. Hope this helps, Good LuckI have an oil leak that appears to be coming from the front of the engine. where would it most likely be from?
IF IT IS IN THE FRONT OPEN THE HOOD AND LOOK CLOSELY AT THE FRONT OF THE VALVE COVERS--INTAKE MANIFOLD AND OIL PAN. YOU COULD ALSO SPRAY WITH A DEGREASER SUCH AS GUNK--HOSE OFF CLEAN AND SEE WHERE THE FRESH OIL APPEARS.
most car or engine when it leak in front while it is park comes from the crankshaft seal, camshaft seal, oil pump seal these seals are mostly situated infront of an engine.
Could be the front crank shaft seal. On an older engine it could be coming from any where.
the sump