There is a guy on radiocontrolzone who has done what you are thinking. Its more 1/8 scale oriented as far as the parts, etc. But it appears he uses the concept of a "b44" style 1/10 scale vehicle setup for his 1/8 scale conversions. So basically his vehicles (I think one is an MBX5) use the suspension components, but the dual deck chassis setup and graphite like a 1/10 scale 4wd buggy. I believe that is how they look, going from memory here.
Main thing is that the vehicles need to have the durability of a 1/8 scale nitro buggy. There is no point to making one if its less durable.
As for the power, I think at a minimum, you will need 3S if you go with a light buggy setup and a 550ish motor.
I think one thing I would like to see as the next step is chassis design on the current 1/8 scale electric concepts like the Caster racing buggy start to work on lowering CG by machining out locations on the chassis for the battery trays, motors, etc. Not fully exposed, but machined to lower there CG. Maybe they already have, can't tell from the pics.
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