If stripped with lightweight parts and high power i reckon it will still be bags of fun even with 4wd. different geometry setups could help make it feel more nimble too, perhaps?
Best plan is to start with a 4mo chassis and drop the lump in that. To retro fit a 4mo system on a fwd base car is a massive amount of work, as you need to chop the arse off one and join it to the other.
Robin do you have to spam every thread with your photos?
Yikes! He's like the SEAT equivalent of teff!