That's why I always say to do your own work, I know time was an issue here, but generally, it's best to do things yourself, so you know they were done right, and if they arent, then it falls on your shoulders... cause you never know what grease monkey is working on your engine whether it be any company. Grant it, you'd need someone to do a little machine work, but the fewer the hands touching it, the less likely it is to get fxcked up.

I am sorry to hear about your misfortune, it's a shame to spend good money on parts to have them turn out not as expected. I think it wouldnt have been hard nor take more than a couple seconds to chase the threads out from the bolt holes you needed to use, whether it be at howell or at your house, but it seems a plug and play block should have the correct bolt holes cleaned up and ready to go imho.