to be honest you'll have a tuff time finding original equipment at that age, not saying you won't but it may be hard. personally I would just measure the space available and find modern stuff that will work, they will be more efficient and you can get DSI equipment instead of pilot light stuff. this goes for the power distribution center also, by modernizing it you get filtered dc power and a 3 or 4 stage charging instead of 1 stage which would be original in that day and age. as for a generator you just need to figure out what you want to be able to run with it and then buy one that will cover that, preferably a nice quiet Honda or equivalent