Engine Cracks!

I have a T337G while installing a JPI 760 EDM a crack was discovered in both engines! (ouch!) The cracks are located just above the fuel controller on both. They are as long as 5 inches and seeping oil. (TSIO-360)

Has anyone experienced this? What is the cause of this? The engine builders are telling me this most likely they can’t be repaired. I might post pictures later if anyone would like to see. BTW, we were chasing oil leaks! Guess we found them!

Any feed back would be great!

Thanks
Cj