Early A body. SB with Lakewood
I have the same issue but it should work just fine as far as I know. Keisler sold me the Lakewood bellhousing for my 340 5-speed swap going into a 66 Valiant. They did not mention any serious mods that had to be made. I don't think they are selling it anymore because they are selling their own bellhousings.
I plan on posting a resto/swap thread once I really get things going a bit more.