power steering pump seal blowing out....5 times now

i replaced the pump with a new one, then put in a new seal, it did it again.

What im doing now is upgrading to the 73 up box. trying to get the drag link pitman and idler arm for it if anyone has those for a reasonable price. i ordered a new box the other day and should be here today. then the whole system will be new and should last a while.