I would never consider removal of the front sway bar unless:
1) I have heard that a lot of the peeps using the HRParts&Stuff rear sway bar system remove the front sway bar for weight savings primarily for drag race usage, but a lot of them claim that a front bar is totally unneccessary even for street usage.
2) Drag race only with virtually no spirited street or freeway on ramp or off ramp driving.
I was in a '87 GN once without a front sway bar, and when we hit the freeway off-ramp sweeper (curve), I was ready to bail. The handling characteristics were that different compared to a car using both front & rear bars. I didn't think that even a late '80's series car could do that bad in a corner.