Bro, with EFI or Carbie both also can masuk into Iswara, no problem what so even, onli thing is mounting have to change at timing belt there loh..
If u r looking for low maintenance n also low transplant cost, i would suggest the carbie one.. there is no point for u to buy half cut because interior stuff like dashboard, meter, digital aircond are not usable, at least not without major mods ler.. plus for carbie all u need is enjin kosong but with complete intake n exhaust lah.. save u the hassle and the precious money..
i think an engine kosong can go for like RM 1000 like that oni or maybe lower, gearbox u can just maintain the one u r using now coz the ratio difference is minimal, if u want longer ratio than straight change to 1.6 or 2.0 diesel ones later on..