Cut the chassis legs off (as we'll be replacing them with some tube)
Then I welded some 3mm thick plates in (which was a nightmare trying to weld to the very thin chassis metal):
Also made a proof of concept for the front mounted throttle body we're considering going for.
Ignore the terrible welding etc, it was purely to get the throttle in the right place so a friend can take measurements and make the whole top half of the plenum in CAD with the new throttle position. Then we'll get the full thing made from billet if everything looks good and the cost isn't too ridiculous.
The reason I'm keen on having the throttle body there instead of the normal position is because then we don't have to have an intake pipe sat right on top of one of the turbos and directly above one of the manifolds. Considering we will have the intercooler exit coming out of the top end tank, it makes sense to just have it go from that into the throttle body at the front with just one straight silicon coupler.