Cryo treating blocks?

I've had parts Cryo treated for at least 15 years. I live close to Indianapolis, IN, so I use Circle City Cryo, which is part of Circle City Heat Treat. It doesn't make the parts stronger, but it does release the stress from the manufacturing of metals and the stresses that occur from the casting process. I always use cryo for springs, retainers, valve keeper, and rocker arms on any engine I build at bare minimum. I also have an Edelbrock Victor 440 intake that's on my 499" that I had cryo treated to remove the stresses. I wanted to heavily port it and didn't want it cracking after I spent all that effort. There is a minimum charge of like $105 for the first 15 pounds and then $6 a pound additionally. They cut me a deal on blocks and heads, but it gets really expensive on those items. It's not in everyone's budget, but it does yield results in longevity of the parts.

Tom