Oil pooling up above valve cover at the base of intake where the carb mounts.

It sounds like you might have an intake manifold that has a leak. We would be more than happy to inspect it for you at no cost and give you an estimate for repair. Just give us a call and set up an appointment. Thank You Your Car Specialists 562-802-1332

poss blowby

Possible fuel leak mixing with residue, just looks like oil.

The oil may be a result of a few different scenarios. PCV restriction, engine blow by and/or intake manifold gasket/housing. The best way to go about finding out is to have an technician perform a diagnostic on the vehicle to determine the best repair. We are AAA approved and all technicians are ASE certified to provide you an estimate for repair. Just let us know if you would like to come in for the diagnostic inspection.