Quote Originally Posted by 53 Chevy5 View Post
Yes, I seen that too on their sump kits. I thought about drilling a hole in mine like theirs but then I thought that hole has to be big enough that it will fill as fast as the pump will suck. I wasn't sure what I thought of the design, it seems like making a swimming pool and then drilling a 6 inch hole in the bottom of it.
If you're concerned with sucking the pan dry when there's still a little fuel around it cut a pair of windows into the sides, then cut a pair of flat plates slightly larger than the windows and hinge them to swing "IN". Tank low, headed up a hill the downhill flap will close, but the uphill will swing open with flow, assuming there's enough in the tank for flow into the pan. Level ground the higher level outside the pan will push both windows open. Just a bit more fab work....