You've got to get the correct fuel pump as using the early one in a late model means the arm doesn't engage with the cam eccentric & it won't pump fuel. Putting a late pump in an early engine works until the arm breaks & the fuel stops pumping. So you do need to be careful about what pump you get. The arms are peened in, so you can't easily change them, or I'd have a large L series fuel pump attached to both my Sunny's. I seem to remember some metal balls in behind the peening that added to the fun.
For the blank off plate, any Series 2 Bluebird will have a plate you can use right at the front of the engine on the alternator side, as they have a facet electric pump at the back of the car( why don't you see if it's still there, it's inside that metal shield between the fuel tank & the rear axle).