I've decided to get a new tank and put in a drop sump instead of a fuel cell in the trunk. I'm running all stainless braided lines with a BG220 electric pump with BG5000 filter....supply is -10AN and bypass/return is -8AN. The sump and fittings are straight forward, but what about the return line fitting? I know that it needs to be as far away as possible from the supply line to the pump but do I need to have a bung fitting welded in, then have an AN fitting with pipe threads on the bung side OR be able to drill a hole and attach a fitting with a seal when the tank is cut open on the bottom side? Also, what about the original fuel line holes in the tank? Any input would be appreciated..
Mike

I've decided to get a new tank and put in a drop sump instead of a fuel cell in the trunk. I'm running all stainless braided lines with a BG220 electric pump with BG5000 filter....supply is -10AN and bypass/return is -8AN. The sump and fittings are straight forward, but what about the return line fitting? I know that it needs to be as far away as possible from the supply line to the pump but do I need to have a bung fitting welded in, then have an AN fitting with pipe threads on the bung side OR be able to drill a hole and attach a fitting with a seal when the tank is cut open on the bottom side? Also, what about the original fuel line holes in the tank? Any input would be appreciated..
Mike

Mike, I did this on my 71 Buick and just had a pipe fitting (for return line) welded in my stock tank in the upper left corner (ps) of the tank facing forward. I run my lines thru the frame and and the return comes out right at the front of the tank. I used a 90* AN fitting there.

I have the same set-up...my -8AN return line is plumbed into the front of the tank as high as I could get it without hitting the floorpan. All my braided lines are also run in the frame...there was a factory hole where I came out of it and it lined up perfectly for me.

As far as connecting it to the tank I drilled a hole and used a -8 fuel cell bung with rubber gaskets and was done with it. I capped the old supply and return line at the sending unit which I kept in tact for my fuel gauge.

Here's a rough picture of my return line...it heads towards the passenger frame rail and enters it just out of site of the picture.

Bill

http://img220.imageshack.us/img220/6940/img0731qq0.jpg

Thanks for the replies....I was thinking I would do what Bill did and skip welding in the return line bung, and go with a sealed -8AN fuel cell fitting as well. I just need to order the new stuff and get it done now:D