another +1 for the odenthal mount and hilliard clutches. My engine came with an odenthal mount (I bought my entire setup used) and after helping some buddies with their karts, idk how anyone could use anything different.
QPT is another good engine mount - pros and cons vs the Odenthal, but nothing easier/faster for setting chain tension and you don’t have to worry about the whole “chain tension changed while I tightened the mount” phenomenon.