So there's about an 1/8 of an inch difference between 67-68 and 69. Not very much to measure and almost impossible to notice. I'm going to have to check that for fun and see if I nailed it. Those measurements sound close.... Little bit lower in back than in front.
I just checked out my 69 vert for the fun of it and I get @ 7" rocker panel height behind the front wheel and @ 8" in front of the back wheel. I used all stock components.