No power to fuel pump, possible main relay?

Hey all! I just bought a 1986 Honda Accord LXI Hatchback. It has nearly 400k miles, but it started up in the field we found it in. After a few drives, it developed a crank no-start issue... I noticed the fuel pump wasn't turning on with the key and the injectors were not getting power while cranking. I bought a main relay conversion (Not sure if it isn't working because it isn't OEM). I think the injectors are getting power now, but the fuel pump still isn't working. I hooked it up directly to 12v, and the car started, but it had a terrible rough idle and misfired. It also won't rev at all, no matter the throttle position. I think it could be the distributor or something to do with that, but I am not super sure. I will check out how the distributor looks and post again. If anyone has any ideas, I am looking for any way to get this thing running... Thanks in advance!
-Sage

Well if you got it to start I would think about the condition of the inside of the gas tank.

The covers for the fuel pump and sending unit are behind the back seat inside the car. I would pull one of them and look inside the tank it may be all rusted out.