Car dies in left turn??

OK heres the problem. When you make a left turn or hard curve the engine dies. Runs great straight or when I turn right. I just had a new tank put in and a new 750 holley. I pulled the tank to see if anything is floating in there and nothing. Was the original tank baffled? I bought the new tank from year one and it's a high quality tank from Canada. Has anyone else ran into this problem with the repo tanks? I dont have the fuel sock on the pickup could this cause it? And no to the smarta$$es out there I won't just turn right.