If the bolts got any material removed with the die, and if the block threads lost any metal to the tap, you've got less thread engagement than you had before. Chances are you'll be OK, but don't risk that kind of damage again. Thread chasers have blunted points, so no material is removed in the cleanup process. I use a somewhat dull tap in the block threads, and clean the bolts with a wire wheel on a bench grinder, if purpose-made chasers aren't handy. Use a good anti-sieze compound on assembly, and reduce the torque specification slightly on reassembly. Torque specs in most service manuals are for bolts lubed with 30 weight motor oil. Bolts lubed with Never-Seez or similar high-stress lubes need 5% to 10% less torque to get the same amount of stretch on the bolt.
Jerry
