I am going to swap on a CS series alternator and am wondering how big of deal this swap is. I did a little research and found that I will need to get a conversion plug for my SI style wiring. Also in this research there was something about gettin a conversion plug with or without resistence built into it in order to energize the alternator and make it work right. It needs a minimum of 35 ohms from what I read. The article I found said that if you have a battery light in the dash, this serves to create resistence and you are ok. I do not know if my '77 Blazer has this, and I do know that if it does it is broken. How would one check the wiring to see if there is resistence in it? Any other comments on this swap in general?