I’ve put Super Shifters in 67-69 Camaros before and like Freddie posted you have to cut a pretty big hole in tunnel for shifter /bracket assembly. I think you also have to cut a slot for the 3-4 rod to clear too.

Get a shifter from Leonard Long, G- Force. You will never use a Hurst shifter again. Best in the business. They can put the handle any where you need it. Quality is # 1.