I just completed the conversion, would like to share what I did; I used a GM 3 wire. The mounting on this was for a 3/8 bolt, drilled it out to 7/16 for better support. I removed the U shaped bracket that supported the old generator. Drilled a hole in the middle then opened it up so was slotted. The slotted hole will then be used to mount this bracket to the block, where it came from. I then inserted a 7/16" threaded rod--about 14" thru this bracket then into the alternator finally into the triangular bracket from the water pump. I added spacers to the bolts into the water pump---about 1 5/8" long, also a 3/4"spacer in front of the alternator next to the triangular bracket. My friend has a lathe so made the spacers, but I am sure Ace has them. The other tricky part is the positioning arm needed to be lenghthed a couple of inches. The bolt that holds the arm is part of the engine mounting. If you can support the engine then replace the bolt with a stud  you might eliminate some issues. The wiring was simple, 10 ga from starter solenoid to alternator splice into this wire and run to alternator--hopefully you will get a pigtail to the the mle terminals on the alternator #2. The other terminal #1on the alternator goes to the switch. Yep probably have to remove the switch to find the "IGN" post. I added a socket between the switch and the alternator terminal  for a 194 bulb to provide some resistance. This light only stays on when starting. I will attempt to add some photo's, would welcome any questions on comments on how to simplify this project. At 1000 RPM I have about 14.4 Volts.