If it's a brand new crate motor then you probably don't need to worry about headgaskets for quite some time (as long as you don't constantly beat the s**t out of it). If the engine was a cheap rebuild or from a scrap yard then you may want to have the engine looked into to prevent future problems.
My 89 SC has 113,000 miles on it, the car sat for nearly two years straight, and it runs great. In a year or so I may have the headgaskets done just to get them out of the way. I'm not even sure if the ones on the engine are the originals as there was no past mechanical repair history with the car.
Either way, just have the car looked at by a mechanic if it's something you're looking to buy.