Last summer I put a Keisler 5 speed in my '70. I found out then that the PO put a 2.73 rear gear in the car and 10% compensator on the speedo cable to make up the difference. Now am looking to swap out the rear gear for a 3.36 but have no idea what I need. I have read that the 2 series gears were in a different carrier that the 3 series gears, so I may be looking at swapping out the entire pumkin. Has anyone had any experience with this swap?