67 type is longer and uses the metal straps to hold the gaiter. The 68' gaiter has a recess for the fork ear cut into it, and a rim on the inside of the lower part ,its the big metal O thats on the 68 type fork seal holder which stops the gaiter from riding up.
AFAIK everything from A10's to pre 68 A65's should have the long oil seal holders fitted, only 68+ are different.
Sure there is more than 2 types for heavy duty forks. I know of (because they are in the workshop) a short type with no lip or ring, long type with no lip or ring, and long with ring, no doubt there are others.
As for the tool not reaching, you should be able to turn them down by hand or with the aid of a strap wrench. If you use a strap wrench, be sure to use it right at the bottom of the seal holder where it's strong, so as not to crush the upper hollow part.
Another good upgrade is to find O-rings that fit the groove at the bottom of the threads on the fork leg. This works way better than the prescribed "#5 cotton twine" seal, but can only be implemented before the seal holders go on.