All Crop 60

Well another one showed up today, actually I picked it up from an auction site 5-6 miles away due to the true winner abandoning it.
A plus is the original owner is my 3d cousin so it’s technically staying in the family (his grandfather bought it new I think) and it’s been sitting in a open front shed for the last 40 years so the draper is completely junk.
One tire was completely junk and the other made it to its new home before going junk (it still held air). Other guy tried pulling the head off to haul on a trailer but he never made it very far before giving up.
The wood is in decent shape and the paint isn’t too bad but I only got a picture of the serial number. It is missing a few parts I think so I might have to go to the one I found in a creek near by and rob them off it (land owner gave me permission).
From my estimate it is around a 1948.

Got everything freed up, the clean grain elevator was stuck (mouse apartment) and of course it broke so I made one good good chain and buckets with both of them.
Need to swap the draper so this one will be fully functional.
Had it running with the pto and everything held together, even the belts which have Allis Chalmers printed on all of them.

Is any of it aluminum?

Not sure what to top is made out of but it almost looks like stainless steel..
Could be aluminum, the way the paint comes off.
Didn’t think much of it until now.
The clean grain trap was completely rusted as when I tried to remove it it went to pieces.
Been trying to flush the gearbox of sludge, put diesel in it to soak in hopes of it coming clean without removing it.

I think the bottom of the head is galvanized steel.