Me too, that's why I wrote it. I've been trying to figure out what size group battery to use. Personally, I'm going to try a Group 34R. It's the closes match to the original battery size. Many people use 24F or 24R, but they are taller by about 1" which I think aggravates the challenge of getting them in around the top oil cooler hose. Also, they are a bit longer and some don't quite fit in the tray. But they have more juice - that's the advantage.