Reply to PNW.Hillbilly:
still available (please get this thing out of my way)
Looks right for an 88 yr old RD4, but dimensions are a wee bit small.
An RD4 hood should be 50" end to end, 27" across, your tape shows 47" and 26".
With a big enough hammer, that's almost close enough.
Got a free 1936 RD4 last fall here in NE Oregon.
"It ran when grandpa parked it" some 40 yrs ago.
Sat all that time out in a field without covers.
Thought I was getting it for parts, but of course I now want to get it running.
Learned a lot about snatch blocks and my Harbor Freight winch
getting it up on a trailer for the 50 mile ride home.