Correct color for '68 Nova L78 parts

[DougsL78]

Hi All,

I rummaged through as many threads as I could over the past few days - and cant find the answer to my question - what is the correct color for the following 4 parts on my '68 L78 Nova resto?

1) Finned front brake drums - i've seen black and natural/cast iron grey on finished cars - but I have no idea what is factory.

2) Rear end - I always thought the diff and rear axles were black, I didn't even think twice about it to be honest. But I've seen a few restorations here on 68's that the owners finished the axle and diff in grey.

3) Leaf springs - same as above - I always thought these were black until I saw some finished cars with natural steel type finish on them.

4) Front springs - the ones that came on my car are black and still have the paper part number stickers on them - but may have been sprayed as I have seen L78 Camaro resto pictures with cast/natural grey finishes.

Apologies if these things have been discussed a thousand times elsewhere and I didn't find the thread if it already existed.

Anyone know what is correct for a proper restoration and can restore my sanity?