I have a 327 small block chevy (about 300hp) in my 53 3100. The fuel pump installed by the PO was leaking,so I dedided to install a new one. I intstalled a Mallory high performance fuel pump rated at 70 ghp at 6-8 psi. Now when I start up the engine it shudders like crazy, but then smooths out. When I put it in a foward gear it starts shuddering again and just won't go.
Any body have any ideas, what the problem may be?? Is it possible that the fuel pump that I installed is to much for my engine??

Thanks,
Wayne C.

1953 Chevy P.U. 3100