This topic is covered very well on the Slant 6 Forum; 1st article under Articles. I converted my '63 3/tree to an A-230 3 speed (floor shift) and used the original bell. For an A-833 4 speed you will need one of the following early cast iron bells: 2463025, 2463027 or 2468431. They show up on Ebay, this forum and the \6 forum. Good luck.