There was one guy here in Winnipeg that auto-x'd one once... then I never saw it again. It had some crazy sheet metal patches, and he may have re-thought his car's ability to handle the intensity of an auto-x course.
For what its worth, I drive a 1600NX.
Here's what you should do with your Pulsar:
Description -
http://www.ffdet.com/members/rich/
Pictures -
http://www.ffdet.com/members/rich/Pulsar/pulsar_wip.htm
Its an 87 with an SR20 GTi-R AWD engine and drivetrain in it.
--Rod.