Mechanical Fuel Pump not pumping

[tex_waco_usmc]

Small Block 350 in Project Heaven, thought fuel pump was bad because it was pumping but so slowly that the carb isnt getting any fuel. Im barely getting any to the inline fuel filter. But, there is pressure in the line as when I take one of the rubber lines off of the filter it blows the pressure off.

Replaced the mechanical fuel pump with a brand new one from the local auto parts store and same problem... I made sure that I got the pushrod onto the fuel pump lever properly, even double checked to make sure I had done the install correctly...

Any ideas????