Sorry not stack...my brain wasn't turned on yet, I meant axle to crown height. Relative meaning if the forks have the same stack height. If they do then the travel would make a diff. If they have different stack heights (take the 66rc from 2005 which is taller than the 2006rc) Travel is only one part of the heigh of a fork.
HA is headangle...in moto terms I am refering to rake.