[Rickysnickers]

I would always check to make sure the heads aren't warped, especially if they are aluminum. If the heads are warped then you can have them machined to straighten them out, not really a big deal. I highly doubt the block will be warped, but still a straight edge will show if that's the case. If it is, then yes, it's probably a major deal.

With all this said, I had an old Fox body years back. It had iron heads and I blew a head gasket. I cheaped out and just replace the one else blown gasket. I never had an issue. Still it wasn't the best idea.