1/5 scale rigs are big and heavy. I don't think a nitro would push it. I have a Baja 5b gas and building another one.
They are not the fastest RCs in the world but they are a ton of fun.
Nitro rigs are a lot faster unless you pump a few grand into a gas engine.
Gas engines are also a bit easier...
I would guess that would be a bit tough to figure out. I run gas RC but it is 1/5 scale and my nitro is 1/10.
Honestly, I wouldn't know where to begin to test that.