My brother actually had small Indy remove his AHC and replace with the cheap replacement spring kit(ended up replacing that with OME) and he got an incredible deal on the labor because the guy had never done it before and didn't realize how much work was involved until he did it.
A little surprising, since the guy has a built 80.
I'm not sure what they could even hurt removing AHC, unless you were trying to save parts or intend to go back to it one day.....assuming they have some experience with torsion bars, springs, and shocks, the rest is just unbolting and draining, and possibly cutting out lines.
I might take Slee's install guide for OME to him to make sure he gets it dialed in correctly.