I can some concerns about running an 900 xp fuel pump that has a pressure regulator setup with with a fuel return line to the gas tank with 1000 xp throttle body that does not have a fuel return line or a pressure regulator.

Does any body know if I will run into problems with this set up? Will I burn up the 900 pump because there is no fuel return line? Will this setup provide enought fuel to feed the 1000.