To buy one and put it on yourself probably isn't too bad; I've never done one myself, but I'm guessing its less than $200. For a shop to do it, expect around $500 or more. I used to have a Pontiac Sunbird and the block got warped. I had to get the gasket replaced 2 or 3 times, and it was about $400 back in 1990 or so. I dunno, maybe someone can give you a better price for a kit you can install.