My sister ran her car for 2 weeks with no oil, so now the rear head is making all kinds of noise, lifter,valve im not really sure but i know its in the head. Anyways am i better off rebuilding the heads or just buying new ones and whats the price difference. 
Bruce
red03ecotec
 
 
2 Weeks???? no oil??????   It would have a problem going 5 minutes with out oil. 
Especially under a load. And would just stop or blow up. 
About $150 or more per head