As long as there good injectors you should be fine. Elevation plays a big role, at sea level I wouldn't even sweat it , at my elevation it can be done but smoke out put will be more than the 60% for sure , i say go for it . On brand Exergy is always a safe choice , but we have been using nothing but II lately , in the last 6 months they put 600,000.00 $$ into state of the art equipment and are finally doing them in house ( they always sub'd them out before ) and the result has been great , I run there 75% sticks in my DD and they by far the best set of injectors I have have had my hands on are almost smoke free and were a breeze to tune .