Engine/Transmission (1994 - 1998) Leaky injection pump on my '93 D350

[JFrodge]

I noticed my truck not starting instantly as it always does. I found that the inj. pump is leaking toward the rear of the pump. I tried to remove the pump but had nothing that remove the bottom bolt at the front of the pump. I was thinking maybe a crows foot would do it but I don't have a 13mm. I ended up hooking everything back up and leaving it for another day. Is there a gasket at the rear of the pump that causes them to laek? The pump looks fairly new. It is barely leaking but when sitting overnight the truck is hard to start the next day. Thanks for your help. I would also sell the truck for 5K if anyone is intersted.