want to upgrade the MB4 power system

I have a old MB4. I want to upgrade the power system, any suggestion? The original Andersen BL esc & motor set is good? I think there is in Waigo. Anyone know how much? About the battery, the size is limited to intellect 1400 or EP 1500 only? If I want to use Lipo, 7.4V/11.1v and capacily is 1400 or higher? Is it fit the orginal battery spce? For other parts, I think it is not necessary at this moment until I crash and break thise parts.

I found some parts information but not in BL esc & motor and battery