Well I'm the victim of my own stupidity. Here is the advise......
When doing a LS1 or Vortec swap and replacing the fuel pump in the tank. No matter HOW GOOD that little &$#^$# connector hose looks that goes from the pump to the sending unit steel line. Replace that little POS because if you don't it WILL and I mean WILL split on you. My motor ran great at the first start up but then started to run like crap. checked everything and finally checked the fuel pressure and I was getting around 12. Checked all the way back to the tank line still 12lbs. Pulled the tank and sender found that hose split like a mellon.
Hope this helps someone else save pulling their tank and pump a second time.