Nice Job jason, dosent even look like a conversion and that is a real sign of a professional job.
The Radiator in the Tecate postion will look great too, It can be hidden quite well and won't mess with the classic lines of the 350X. An added advantage is that it may even weigh up the front a little bit, help out with all that wheelie action that you are surely going to experience.
I'm looking forward to someone doing an 84/85 Tecate fitted with a KX450F or even a KX250F donk now. I'd love to do it but unfortunatly these Tecates are as rare as rocking horse poo in Australia. I've only ever seen one 85 in Australia and that was back in 1985.