Yeah 1,2,3,4 are all fuel lines and connect like you said, just match the diameters because obviously the bigger is fuel feed the smaller is return. Number 5 looks to me to be your vac assist for your brake master, you'll know all about it if U dont connect that one!!!! lol. If you can get it to run I bet it wont be a real quiet idle lol and ya brakes will be crap.
As for the heater hoses, same again, as long as one comes from the back of the pump and one returns to the thermostat housing its all good. Depending where you are in SA you can check mine out if you need.
PS, I hope you have a surge tank!!!! GL with it mate
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