Where to reference boost with rising rate fpr?

[FattyBoomBatty]

I'm going to be getting the aeromotive regulator probably, and I was wondering if I should connect the vacuum line before or after the throttle body? If it sees vacuum in the manifold vs. much less vacuum in the i/c piping will it get goofy? My old FPR was hooked up to the intake manifold after the TB and sometimes it would fluctuate the base level, I don't know if that was because of the regulator or the vac. source.

I just noticed someone else's fpr connected before the TB, and I remembered that a stock quest has it referencing before the TB.

Anyone know for sure?