So we are getting the car back together to get ready for the dyno and my fuel situation is driving me up the wall

I have the full blown setup with 2 walbros and cannot get this put together driving me insane. Over 2 hours and just fighting it.

Could I run one 400lph pump on full blown and just plug the other hole ? I have the -10 I think feed and -8 return hooked on to it so I can't just go to stock adapter to single pump

My HP goal this year is 700

Any help appreacited

 

Why cant you get it put together?

 

Watch this,
The instructions are on here with detailed pics, I just checked it.