Pulled the exhaust, still low vacuum

[Tampergeorge]

Disconnected from exhaust manifold. Could the timing mark on the camshaft be off that far from a 90 mustang to my 87 Ranger 2.3? Its really starving for air; I sprayed a little startin fluid in the air filter and it killed it. I can rev it up by pumping the throttle, but still has no power. No back fires, so I'm sure my intake valves are closing. Any ideads?

 

[Tampergeorge]

180 to 184 psi all cylinders. All ports sealed, plugs came out sooty. Next up, exhaust manifold.