I know there's probably a million threads about this, but I'm not getting my questions answered through my research so far. As the title says, we're converting my son's 1962 CJ5 fuel system. Someone had already abandoned the mechanical fuel pump before we got here, but we removed the small tank from beneath the driver's seat, and cut out the x-bracing in the rear and installed a steel 15 gallon tank from Crown. (See the attached pic) So I have several questions. The electric fuel pump someone had already converted the old tank to pulled off the bottom. Is there anyway to know for sure it will be capable of pulling off the top of this new tank? (See other attached pic) The sending unit was never hooked up on the old one. The previous owner was using a yard stick to check his level. There was only the old instrument cluster with a fuel light, but of course was not working. This new sending unit has an insulated post and a tab soldered on the cap. I'm assuming we run a wire from the grounded tab to frame ground? And then run another wire from the sending unit post to a fuel gauge? Is there a certain fuel gauge you all would recommend? How important is it to install a fuel liquid check valve and run the two fuel tank vapor vent lines to it? I was told I could just hose them together as shown in the picture but that may be a bad idea. If I do use the check valve and vapor vent lines, I guess I then run the liquid check valve to cannister hose back to the fuel tank cap? (The other hose I have capped off) I have a gut feeling that if we don't use the check valve/vapor vent lines we may lose purge on the fuel system, or vapor lock the fuel line, but obviously we are novices at this so I don't know. I'm sure these are extremely newb questions, but we're getting ready to set the tub back on this thing and I'd like to not have to pull it off again, or drop the gas tank from underneath. I appreciate your time.