yup..75 is right about 4000 or so. i hate it too..forgot that recently untill i took my 88 on its first highway voyage.. Aaauuugh...
we'll have to see what my s/c does. could be one more thing to like about it.
however, 4k is still just off the valve timing, so i can either floor it and wait for it to kick in and be ready to pass, or just downshift, which puts me right about 46-4700 and then i'm ready to pull down the highway. overall, not too shabby. just higher than i like. my turbo is closer to 3500 or so at that speed, and my subaru is ever lower, which is suprising given its low gearing.