They are very prone to cracking on the front coolant crossover. Is this where yours cracked?
Mine cracked there and I did a tempoary patch with JB weld and it held for a week. That'll work for an emergency fix if you have to drive the car. Just make sure to clean the area very well and rough it up with some sandpaer first.
You're gonna want to go ahead and replace it with one of the new intakes that have an aluminum coolant crossover. Now would be a great time to put a PI intake on it. I understand alot of guys are doing that swap now and seeing really good gains even with NPI heads.

David