Hey guys,
I've been trying to find a resource that explains the different nose cones and which can fit what but haven't been super successful.
Can someone point me in the right direction please?

Questions I have are:
Did only Premiers have twin headlights?
Is there/what are the differences between HJ/HX/HZ fronts? what about the twin head light models?
I see in some there is more radiator hanging down below the bumper, what designation are these?
Are they basically all interchangeable from HJ/HX/HZ?

Thanks!