Yeh the big fat space is for either a Radtec or Pro Alloy cooler, i have my 2.1 ZT sat in parts in my shed, just need to get a 2.0 block crank and rods and i have the rest is already done as i have bought a previously built tried and tested ZT head, inlet, wiring loom, ecu and chip (with ZT mapped into it). Got the calli turbo pistons, AP brakes, mk5 master cylinder and survo adapted for the mk3, AVO coilovers ect ect... the list goes on. Will be doing my step by step ZT build over winter once my shed is fully kitted out with power and my tools and i get my mate round to build me a work bench.