It's a shop owners own descision on what jobs he takes on. I checked out the shops www site and seems they have plenty of work. I based my comment on what the guy that knows the shop owner posted above: the shop owner attempted to talk the hemi killer out of it, yet he took the job on. If he felt strongly about it, tell the guy to take a hike.
It obviously was a descision based on money, not what he felt was right.
Just in case it comes up, yes, I have turned down jobs (not car oriented, but engineering) because the owner wanted something I did not feel was appropriate.