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Will 3G alternator fit in stock position of 68 galaxie with FE 390?

954 Views 14 Replies 8 Participants Last post by  808Mark
Has anyone put a 3G alternator on a 390 in the high mount position? I'm really tired of my fitment issues i'm having with my GM10SI case. The bump on the back hits the head of the motor. I'm not interested in going to the low mount style as i'd like to use the original brackets as much as possible. I measured from my bracket to the block and its extremely close to if not slightly more than 4.5 inches. The dimensions off of summit say from the mounting surface to the back is 4.5 inches.


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Great information in this thread—thanks! I’ve been hesitant to do this swap because some folks complain about an annoying belt whine during startup. Is that not an issue for you all?
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