What do you mean by seal the bottom/front of the box? Mine has a plug that fits tight on the bottom. All I had to do was synch up the box through the firewall to the snorkel. I used some Fenco plumbing parts and a PVC pipe.
Just installed the Safari with my AFe and it worked great. I still need to seal the bottom/front of the filter box, but it was easy and the fit was perfect - only downside was that I peed a little when the 4 1/8in hole bit started to cut into the fender...:mecry: