This was a reply to my search for a adapter plate in the PARTS WANTED FORUM:
I don't think you need an adapter plate to mate a Powerglide to a sbc.
The conclusion and some of the facts are wrong.
The 207/216/235/261 (Chevys) and 228/248/270/302 (GMCs) have a much different bell housing bolt pattern than the later 230/250/292 and the 283/327 and other GM V-8s.
If you are trying to put any of those motors in front of an early Powerglide that was originally attached to a 235 you DO need the right adapter.
I wish people who don't know what they are talking about would step away from the keyboard.