i had no shop vac, i pretty much did the same but pulled the dog bones, and pushed the engine back and fourth to drain the lim, i also had nothing leak out when i pulled the lim off and also did not do a a oil change after the fact.
i broke the plastic coolant elbow before un bolting the lim too, then you pop it free and then lift it up as level as you can. theres a small lip that will hold back the small amount left in the lim. but if you tip it one way or the other it can leak out easy.