One thing I will say about Westside, and Jim Wendler would agree with me on this one, don't use goodmornings as a max effort exercise. At anything below a 5RM, it's very easy to fuck up the form and very easy to hurt your back.
This is one of the main reasons people turn away from Westside is that they think goodmornings are integral to it. They find themselves getting better at doing goodmornings but not squatting or deadlifting any more weight. If you're gonna use 'em, keep them as a supplemental exercise.
There may be some people who can keep the form at these low reps, and more power to them. I'm not one of them.
It's a great system though, I think those numbers are achievable within a year.