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Old 05-25-2019, 07:39 PM
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Crankyolman Crankyolman is offline
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Join Date: Sep 27, 2017
Location: Pacific Northwest
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Alternator swap question

As some of you know I have upgraded my '72 J4500 to fuel injection. As a result my truck is now pushing the limits of it's little 30 amp Motorola alternator and I need to upgrade it to something better.



So that brings up the big question, which alternator do I replace it with?


I've been thinking about this one which is technically for a 1980 Cadillac

https://www.autozone.com/batteries-s...33393_969991_0


But would this one be a better choice because it's for a 1980 J10?

https://www.autozone.com/batteries-s...33377_802605_0


Then there is this one from Amazon which has good reviews but I'm concerned it might be too large to fit.

https://www.amazon.com/ACDelco-335-1...ateway&sr=8-67


Would one be easier than the other to put in my truck? I'm not afraid to do things that could void a warranty like cut away bits of the mount to make it fit. I know what I should do is head down to Pick-n-pull and get one there but that takes more time than I have to spare so the auto parts store is the best option right now.



Thank you for any input on this.
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'72 J4500

Last edited by Crankyolman : 05-25-2019 at 08:04 PM.
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