I didn't have to do any welding or buy any new parts (other than the alternator and the DA connector)
I simply flipped the generator mount end for end and drilled a new hole for the middle bolt to go into the block. That completed the lower mount.
A simple spacer was used to keep the new alternator in line with the water pump.
The threaded hole on the alternator's adjustment tab is too close to the case; you can't use a straight bar from the alternator to the water pump bolt. That's why many people buy a curved adjustment plate. I made a triangular plate for the alternator to move the adjustment hole further out and reused the old generator's adjustment bar.