Cut and Pasted from this posting:
http://www.ifsja.org/forums/vb/showthread.php?t=117604
This what I did on my J10 project....piece of cake! One Banana Job!
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Front View
Back View
Parts needed:
* Bracket (the part shown above)
Though many have had success modifying the stock SI-10/SI-12, but they have limited belt adjustment range, and the stock bracket may hit/rub interfere with the oil pump housing. YMMV
* CS-144:
1996 Cadillac Deville 4.6L 1994-1997 (Without Heated Windshield defroster)
Cadillac Deville Concours 4.6L 1994-1997 Cadillac Eldorado 4.6L 1993 Cadillac
Eldorado Sport Coupe 4.6L 1994-1997 Cadillac Seville SLS 4.6L 1993-1997 Cadillac Seville STS 4.6L
Is the easiest to use for clocking/mounting, other version can be run but might
require some messing around (re clocking, adding threaded insert in the tension
ear ...)
* Belts: (With AC, I don't have a non-AC rig to test on, but likely hair longer than stock, should work)
Stock are a little on the short side Gates 7516/Napa NBH 257516, work well with this bracket.
Matched sets seem to be a thing of the past, so compare them, match lot numbers, in a pinch measure them and go though the parts store inventory to find the best possable match.
* Harness adapter:
NAPA ECH82 (Summit, Delco .. also sell these) adapts your current alternator harness plug (All FSJ's with Delco alt. , all after ~1977ish) to the CS-144, and has a in-line resistor)
* Tension bolt:
10mm-1.50 flange or washer bolt.
Installation and wiring:
There are many threads (sorry if I missed one or two) do a search, know your goals and keep it simple.
General theory of operation (Know what you are doing, read this)
http://oljeep.com/AltTheory17/Alternato ... on17R1.htm
Serpentine belt pulley removal from the CS144:
http://www.ifsja.org/forums/vb/showthre ... 144+pulley
General mounting (OEM Delco SI-12/SI-10 rigs)
Check the pulley alignment, you may need to add a washer or to to the long tube spacer, some need to be shimmed out a hair some don't.
The CS-144 is going to be more picky with loose or glazed belts, it can require as much as 2X the torque to turn at full load vs. the smaller alt. at the same RPM. ( 140 amps requires ~twice the torque/belt load vs. 70amps, at any given RPM)
Wiring:
In general: Do not expect your current output wire to handle the 140 amps a CS-144 can output, without creating a fire hazard. A larger gauge wire directly back to the battery, is pretty much mandatory. (fuse or fusible link in this wire is highly recommended)
If you jump start someone, the CS144, will attempt to provide full current (140 amps if at high idle) to your battery connection, you do not want a small gauge wire trying to carry this current back to your battery, (GM used a 6ga wire for the output, many have gone larger 4+ga. )
There is a couple diagrams in this thread, on possible way's to power the current fuse box,
http://www.ifsja.org/forums/vb/showthre ... ight=CS144
I think most users use the current 10ga Yellow (has a fusible link) as the feed, some use the Red old alt output line (now unused but still hot)(you would need to add a fusible link as there is none, if you use the Red), either is fine IMHO, I would not use both, and using both would IMHO create a hazard, due to the added short circuit current from two parallel fusible links. If you use the Yellow feed, be sure to isolate and secure or eliminate the unused old output wire it is still going to be hot, and could make a mess if left floating around waiting to short out, similar note for the Yellow if you use the Red wire.
The large alt is not to feed more power to your current system, it is there to handle non-stock loads, (Winch, Plow pumps, jump-starting, ghetto-blaster sound systems, electric fans, off road lights ....) as such place you new loads on the output of the alt, do not hang large non-stock loads off you current fuse panel.
Since the stock ammeter is of no use, here is a neat solution to add a volt meter in it's place:
http://www.ifsja.org/forums/vb/showt...ight=voltmeter
Wiring Diagrams for many FSJ's are here
http://oljeep.com/gw/elec/GW_wiring.html
I am sure I am forgetting missing some good threads on converting to a CS-144.
Mike D.