looks like the Cal-Van repair kit just sold under Jet Tools logo. i got my kit from Snap -On and looks like the same kit.
from research i did, these are suppose to be one of the best kits out there for doing this repair and is suppose to last the life of the truck. from research i did, all the major head rebuilders use these kits as standard on their rebuilt heads to get away from this known defect.
i plan on doing the other 7 when i get some time. very easy kit to use and install.
i defiently wouldn't worry about the cyl with the insert, the other 7 i would worry about.