Thanks for the very kind comments everyone.
I know the engine isn't perfect and would never run, but the idea was that the intercooler at the front was instead the induction system for the turbos.
I thought about having the front removable, but at that stage I had got too far into the build and it was getting out of hand, hence the reason it doesn't.
The supercharger belt is made from Modellers seatbelt material.
The turbo plumbing is solder and the connectors are made from blue heatshrink material, with signwriting vinyl for the straps and a photoetch nut. BMF would probably work but it didn't seem to stick as well.
Once again, thanks everyone.