Will Group 27 Batteries fit in Ford Think

Will be getting a Ford Think next month. Will the Ford Think be able to accommodate a Group 27 battery that is approximately 1/2" taller than Group 31 batteries? Assume would need modified hold downs for the outboard 2 batteries? Can someone with Think measure clearance height above group 31 batteries installed in Think?

Why would you want to do this? 27 size batteries have less capacity than 31’s.