@Charlie DiLisio So, you're saying use drywall compound (which is basically a type of clay/putty-ish material) to flatten and smooth out the cinder blocks (since right now they have divets in between each block)...

Set up a tablet or laptop.

Paul,Through the years we have looked at many projects with cracked foundations, our area is mostly clay and most houses built in the 70's have foundation issues.

Originally posted by @Clay Chandler:Hey @Engelo Rumora.

It's not what you can see, it's what you can't see that will reach out and bite you right in the behind.The only way you can even get close to a realistic cost study is to strip the home down to the bones, thoroughly inspect the foundation, check for adequate drainage away from the structure, thoroughly inspect the infrastructure including the cast iron and/or clay water and sewage plumbing and the electrical and gas lines. 

sorry for the typo's still getting used to my new tablet lol

This kind of cracking is very common in areas with clay soils under the foundation.

Drain tile is called that because it used to be literally round clay tiles that would be slightly separated.

Thank you @Clay Powell, I will mention the concerns to the Home Depot guy when I get the material. 

But Tanzi notes that “most of what you inherit is written in clay rather than in stone.