I used the Milodon low profile one on my 66 NYkr. Called Milodon before I bought it to confirm if it would fit a C-body. The listing didn't show a C-body but it said it would fit an A-body and you use a C pan to put a BB in an A-body sooo... I called them and their tech dweeb said it would fit no problem. Technically he was right, it did fit, so long as you didn't have a problem not turning right more than what is required to change lanes.
. We had to cut a window into the sump so the idler arm had somewhere to go. Now it fits.
Kevin