It is converted. No second battery - HDJ was only 24v starter. I do not see idle up button. It is usually located at the same place of the idle up knob. No tag plate on the firewall - which defines it as US market vehicle. Plus as KiwiDan said - tacho of the diesel should look like this
View attachment 1411275
I'm pretty sure certain markets got factory 12V starter 1HD-T's.
