I would troubleshoot the whole system before throwing a bigger fuel pump at it. You might have a problem somewhere else. The holley blues have been powering fuel systems for a long time so that might not be your problem. Use your eyes and some common sense instead of some marketing guy saying.....This is the pump that you NEED! It'll cure all your ill's.
He just wants to sell you something. :220v:
Happy troubleshooting.