I suspected the reason my Delica pulls to the left was unequal wheel distance from suspension pivot point. Had Ryan take the front wheels off and I measured the distance of the face of the hub to a datum on the suspension both sides, also the inside of the tyre limits to the mounting face of the hub.  No irregularities of any significance were discovered.  Was able to determine that brake drag was also insignificant.  

Conclusion: suspension geometry is to blame but did not isolate the offending part. Assymetric tyre wear pattern is insignificant to date. 