I used the GM Hotrod oil pan on my 1998 swap. The steering setup is different, but it may work for yours as well. Here's a page that shows the various LS style oil pan dimensions:

LS SWAPS: Oil Pan Guide
LS SWAPS: Oil Pan Guide Includes in-depth instruction and photos. Covers all the criteria to consider when starting an LS swap project
That site is very valuable for what you're doing.