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Old 04-02-2020, 06:10 AM
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tgreese tgreese is offline
 
Join Date: May 29, 2003
Location: Medford MA USA
Posts: 11,206
The brackets for the Delco alternators are slightly different. You can address this by either buying a Delco made specifically to replace the Motorola (look online), or by minor machining on the case of the Delco alternator.

You could buy a 10SI for a Jeep application, like a '76 with a 258. You'd still need to hack the case some. I think you drill out the bolt hole a bit and maybe cut off some of the length of the mounting boss. Search online - someone must have covered it. https://www.rockauto.com/en/catalog/jeep,1976,cherokee,4.2l+258cid+l6,1179266,electric al,alternator+/+generator,2412 It's very easy to turn the case ("clock the case") to whatever angle you want. Use a toothpick to hold back the brushes when you put the case halves back together. There's a hole specifically for this.

You could also use the Motorola. It's a pretty bad alternator though - the diodes in them fail a lot. You'd also need to put the external voltage regulator back.
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Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination ATs, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
ECO Green: '15 FCA Jeep Cherokee KL Trailhawk
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