The 4m40T engine is being cloned in china, so ironically aftermarket parts are somewhat cheap. It's actually found in plethora of china pickups/ SUV. So a set of injectors is less than $100AUD, a head gasket can be found for under $50 and a fully assembled new cylinder head is $500...How long they last is about as sure as a big bore kit for a CG250 does
If EV conversion kits were cheaper I'd love to got down that route but as for now an Indirect injected Turbo Diesel has got me grimed up.
https://ziptek.en.made-in-china.com/...hallenger.html
We have RAM pickups in Australia too now...lets just say after exchange rates and taxes you're looking at over 150k.