$100 a good deal for 8 Donovan forged aluminum connecting rods?

They are for a small block. Center to center length is 6.125. They're all stamped "Mickey Thompson".

No, you need to have them measured for stretch to make sure that they are still 6.125" centerlines...

It's a given that they were originally made for the 6.125", but after they have been run, do they still meet that spec, or have they stretched. That is the point... #-o