You know what, guys?
For those of you who are planning on taking this beast on, you really owe it to yourself to locate one of the "Aerofax Minigraph #27: Boeing Helicopters CH-47 Chinook", by David Anderton and Jay Miller! It is a virtual goldmine of detailing information! On the front cover is a color photo of the CH-47 series "First Flight", with #94983 just after lifting Her into a hover!
Hmmm... speaking of the YHC-1B, did you all know the soul remaining example, #59-04986, now sits, rotting away, at the Structural Repair School for the United States Army at Fort Eustis, Virginia!
They're about to scrap it, and looking for an interested party to affect a restoration. (like the Army Aviation Museum at Rucker) Would be a shame for the babe of the bunch to get the ax!
You want some fantastic reference walkarounds on the early "A"? Check these out!
http://www.chinook-helicopter.com/history/aircraft/A_Models/59-04986/59-04986.html
Take care,
Frank