You'll need some metal work to make a couple of brackets to support the top. I'd advise 3mm thick.
You'll need a couple more alloy joiners too.
TBH I'd also suggest scrapping the bayonet fitting, get an extra alloy joiner, chop it in half and tig weld it to the turbo outlet pipe. It's tight in that area and getting it tigged at the right angle makes life easier.