We measured an extra fuel tank (we have 3 tanks, all with holes rusted in them) from a wagon tonight. The wagon tank is 20" deep, top to bottom, and about 20" square sides with a width of about 10".

Installing a modern in tank fuel pump will be an interesting project if we have to come in from the top. Are there options where we might be able to come in from one end or from the side with a pump that sits at 90 degrees? How about, since the bottom of the tank is only 10" wide (side to side) and about 20" long (front to back) will we have a problem if we attach the efi pump to the wagon sending unit and let it hang just off the bottom of the tank? We can add front and rear baffles about 6" high off the tank bottom on both sides of the hanging pump, will that work? I figure we are going to have to add at least on baffle to prevent fuel movement front to back, so it wouldn't be a big deal to add a second one on the other side of the pump. I figured we would have a piece of steel formed across the top, bent down the inside, bent across the bottom, then bent back up the outside. We would have a weld seam across the top, and on both ends + on the sides of whatever we put inside for baffles. We will probably have to round the top rear corner to fit in the car. We would have the fuel pump/fuel pickup & sending unit and a fill hole on the top surface of the tank.
The thing that will suck is that the tank will have to come out to replace he fuel pump.

Think the hanging efi pump with front and rear baffles will be good enough that we won't have an issue? Gene