BA may be quite correct, but a post in this forum or any blog site does not constitute fact - but I would say his arguement has more validity than say wikipedia.
What sources can validate your claim - the Dash 1, for example. I don't have production lists for UH-1s, but based my reference on the Cs purely from that US Serial book I quoted. Unfortunately, it's purely a sole secondary source. [Sorry about the thread drift from MRH-90]