Holley Sniper Issues

Got the basic Sniper for my 68 340, with the OEM style fuel module sending unit/fuel pump from Holley. I have a "Ready to Run" distributor. Hit the key the fuel pump comes on like it should, shuts off after a few seconds, go to start and it won't fire up. sounds like not getting fuel. Check fuel at the inlets it is getting fuel,(purged lines to get air out, lots of gas) if you pour a little fuel into the primaries, it fires right up and runs, just till it uses that little fuel. Any one got any ideas or had similar issues? Calling Holley monday. Thanks