Join Date: Mar 2002
Location: Austin, TX, USA
Re: 93 3.4 v6 alternator
I'm not sure what CS means. In general though, a CS alternator will have a 5-pin weather pak connector on the side of it. It has ball bearings front and rear. It's machined to tighter tolerances and is smaller. The regulator is internal. It's capable of putting out decent charge currents at lower RPMs.
The only thing you'll need to beware of with the CS alternators is the "clocking" of the cover. The angle between and position of the two mounting tabs determines the "clock position". My CS130 in my 68 is a 9:30 o'clock. There is a mount point near the bottom (like the big hand) and one near the 9:00 position (little hand).
You may also have to swap pullys, but that's a piece of cake if you have access to an impact wrench. Many auto parts stores will do it for you also (if you buy their stuff).
As far as I know the CS120, 130, and 140 are physically the same, but have different output capabilities. Perhaps someone here can say for sure...I'm not certain.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI