So - A bit of hacking, sawing, milling and swearing later.
Red circles around the mounting bolts - Helicoils in the heatsink - still some little spacers to make so teh alloy does not actually touch the ABS
Green circles around what would be the mudguard mounting bolts. And obviously that BIG HOLE needs to be covered (maybe with a fan inside).
A LOT of metal has come off. It's a bastid shape inside that chrome thing.
Need the brass "earth" screws now before I go further.