Yes had to swap old pulley on there. Here's what i don't get though, i have tried 2 supposedly good v-regulators and this new alternator all with the same results. Voltage just drops when loaded. I did try another battery, i got 14v right after starting, but in a few minutes the voltages tanked. Are there any relays that would isolate the load of accessories from the alternator? I guess i don't see how it could put out all the amperage needed but still have such low voltage.