Sounds like a fuel delivery problem. The fuel filter, fuel pressure regulator (not increasing pressure) or the fuel pump could cause those problems.
Start by looking at the regulator and make sure the vacuum hose didn't fall off. Then buy or borrow a test gauge...with vac line off the regulator you should be getting between 38 and 40 psi on the rail. With vac line attached it should show about 35 psi at idle and pressure should increase with manifold pressure.
Poke the throttle hard enough to get into boost and confirm that fuel pressure is increasing pound for pound with boost. 10 pounds of boost should result in 50 pounds of fuel pressure. With a weak pump or clogged filter you will not be able to maintain flow and pressure when in boost and the fuel pressure reading will begin to fall instead of raise.
David