It's an interesting study. The 2H was ubiquitous in the overseas market however the 12HT was a relatively short run (from my understanding). Why they did some reengineering to make the 12HT is worth considering. Toyota's engineering motto seems to be to over engineer and under power which is...
Might be an unpopular opinion but I run gaskets even with the ones on the insulator. If nothing else it makes me feel better about not having leaks. There are two, one that goes between the carb and the insulator with 2 holes for the primary/secondary and a second that goes between the...