Mate in all seriousness there has been some solid advice already..if your chasing 500+ reliable killer wasps I hope your pockets are deep... much, much more than what's on your parts list will be required. Your going to need gearbox and tailshaft done minimum, id be doing twin diff bush mod and drive shafts at that level for peice of mind.. Fuel system, the id1000's probably wont have much left in them at that level but im not exactly sure on that, BRAKES ffs, why would you want a 500kw barge with no brakes... suspension and tyres are important 2 or it will be useless. Or you can not do any of that and just be constantly fixing the thing as it breaks sh*t.