Best thing you could do is by a different pump and save yourself the trouble IMO
in the matter of a hour on a friends dragster we took off his orginal that started to leak and put on 3 peoples spares and 1 new one, every darn one of them leaked even the new one. He went to motorstate and put a magnaflow on it and hasnt had a problem.
First BG 400 pump I had lasted for a long time never had luck after that.