Yup, 283 has the 3" stroke, 327 has the 4" bore. The way I went initially gets you a 307. which was a very weird motor. 327''s and 350's share the same bore dia. Knew it had to be one way or the other (or both) And I did qualify the proposition with an "if so blame my memory, not me. (LOL)
Nick
I only got it partly right too. The bore/stroke combo was all I could really remember.