Are you 150% sure you tightened the hose clamp fully on the hose that goes between the pump & fuel pump pickup assembly??Were you having similar issues before you replaced the pump or did the issues begin only after you installed the pump??There must have been a reason for you to change the pump,unless you were just replacing it to upgrade to a higher flowing unit.One thing you can do is test it while the dieing condition is occurring.Remove the breather tube(between oil filler neck & throttle body)from the throttle body,spray carb cleaner or starting fluid into that breather tube nipple on the throttle body,reinstall the tube,try to start the engine.If it starts & runs for a few seconds then dies,you've got a no fuel problem.If it doesn't start at all,you've got a no spark problem.You need to check the fuel pressure regulator and check fuel pressure.Let the car idle while you remove the vacuum hose from the fpr.If fuel is seeping from the regulator vacuum port or fuel is present in the hose,the regulator is bad.Check fuel pressure.AUTOZONE rents fuel pressure test kits for a small refundable deposit.Pressure should read 30-45psi with the key on/engine off,30-40 with engine running.Now turn the engine off & take a reading.Wait 5 minutes and take another reading.Did pressure drop more than 5psi in a 60 second period??If yes,the fpr is defective,the fuel pump hose (I mentioned earlier)is leaking or an injector is leaking internally.
I would also inspect your fuel lines from the tank to the fuel filter,to make sure none of them got pinched when you raised the tank back into place.Did you reattach the vacuum hose to the vapor valve on top of the fuel tank??If not,the tank could be collapsing & stopping fuel flow to the engine.The purge valve draws vapors from the tank through that vacuum hose.You can also try pulling codes just in case any are present,due to the misfiring and stalling condition.All you need is a jumper wire & a functional check engine
BTW-the check engine light doesn't have to be on in order for codes to be present,so run the koeo koer scans.