Oil pan replacement may not be allowed in your class. Adding baffling is allowed in street tire classes. But, oil pans are a patch and may not help that much. If you're modded and going to Street Prepared anyway, an Accusump would be an option that will work well.
I run without and don't worry. Use 6 to 6.5 qts and make sure it's always at least that full. I think I may be losing some power thanks to the exta oil (I do 6.5), but it's worth it.
Here are two threads:
http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=scca&Number=599862http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=scca&Number=865103Basically, you very rarely have long, extended turns in autocross. There's almost never enough time to get the oil away from the pickup and suck air. If there is a very long right-hander, either straighten it out into chunks (may be faster anyway) or shift up. But I haven't run into a course with one that has made me worry yet.
