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after having at least two of those header brackets break, I went with an Alan Grove alternator bracket. no issues since

http://www.alangrovecomponents.com/Catalog.htm

 

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I put an Alan Grove bracket on mine with headers, the alternator vibrated real bad. I ended up using the head bolts. Without the head bolts, I don`t know what to tell you.:anim_25:bowtie-trifive:gba:

that's odd. did you contact Alan Grove about the issue?

 

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my experience with the 213L Alan Grove alternator bracket is the bracket is solid with no alternator vibration. the bracket was raw metal and I painted the bracket pieces black. my 327 has double hump heads with no accessory holes so the alternator bracket options are limited.

http://www.alangrovecomponents.com/images/Instructions/213L.pdf

 

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not even close

 

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The 213L Alan Grove alternator bracket is the bracket I have. It vibrates really bad. Maybe we should contact Alan Grove. bowtie-trifive:gba:

are you sure it's not the alternator bearings going out?

 

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I thought that might be the case.

i'm guessing it was an alignment issue. do you have a stock short water pump with 7/8" top mounting boss where the alternator bracket attaches? I have an edelbrock water pump with a thicker boss so I had to use a different spacer to get the pulleys lined up.

that's all I got :sign0020: