I would want too see it up close and personal. Wrong color engine, shackles on leaf springs, some odd pockets sewn onto the door panels and really rusty turn signal stalk could mean someone left the window open many times in the rain or flood, these could all be minor issues, again I would want too see it in person and confirm it's an H code.
By "H" code, do you mean a real Duster 340 and not a replacement motor that has been transplanted? Does the H code designation appear as an option code or is it in the VIN?