Okay, so Dad and I have and early 1936 HPO 70. (204870)

We, okay HE, is finally starting the restoration and the deeper he goes into the tractor, the more confused he's gotten! And it's our understanding, '36 was a very transitional year which we've been told may make ours a little more unique. 

I know I've posted before about the HP not being cast into our radiator cover (still dont have any answers or suggestions on that - still curious!) He's also noticed our radiator wasnt held on by anything more than the cast iron... is this correct?

Next, Dad noticed before disassembling the tractor, the brakes were becoming an issue, so we (yeah i was there to help this time!) took the covers off of the brakes to see what could be seen and Dad believes there is alot of oil in there....Is this appropriate? He knows nothing about brakes on Olivers of any kind.... 

Then he found these curious little gold things on the engine, we met up with another person from this board and theirs didnt have these gold/brass pieces on it.... what were they? what were they for?

in '36, where were the lights most likely placed? we had 3 on the fenders, but what we've seen around is 2 in front one on rear of fender.....