[MARKDTN]

You really want a 3-wire. A 10si or 12si are both fine. The 12si is the later style with a little better cooling. For the lower amps you are talking, both of these are fine. If you go around 100 or more you want to go to the CS style. I would not use a CS130 for a paperweight, but the CS144 is much better and reliable (for these you need to change from sepentine to v-belt pulley). For the 10si/12si an 1986 307 Oldsmobile application gives the connection up and 94A 12si. If you have a long water pump and passenger side alternator, maybe a 1976 C20 application. This is plug towards the drivers side 63A or 78A. Many places seem to be substituting 12si for these.