Converting B5, Horror on the Hill....
This one shouldn't be hard for you to convert. You may even be able to do it on-the-fly. AIR, the module uses standard monsters that can be found in the MM1. You may need to look over the traps though. If you need to BS a saving throw, I usually set them to a DC 20 unless it's a spell that's cast at a player, then I use the standard 3e rules for that.
--Ray.