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Old 09-01-2017, 12:14 PM
Todd Mullin Todd Mullin is offline
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Default Correct Parts 71 Formula

Replacing missing and wrong parts on my 71 HO Formula and could use some help.

Missing AC bracket that the dip stick bolts too. Is this a HO part or can I get one off any 71 AC Firebird?

Car has a flex fan I would like to get the correct clutch fan. I can't seem to find a part number for the fan? Is this also going to be a HO Part?

I also would like to get the correct date coded alternator.....I see some HO's with the "Open Face" and some that are not. Should all HO's have the open face?

Thanks, for any help

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Old 09-01-2017, 01:56 PM
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68bird400HO 68bird400HO is offline
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The alternator is not HO specific. With AC you would have a 1100928 55A alternator. These were open face through April 71 date codes then went closed face starting with May 71 date codes. What is the build date of your car?

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Old 09-01-2017, 03:06 PM
Todd Mullin Todd Mullin is offline
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So my build date is first week of July......if I use a May build date alternator will it be correct?

Todd

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Old 09-01-2017, 03:30 PM
'ol Pinion head 'ol Pinion head is offline
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the original "927" & "928" alts cycled over from being built with open frame frt hsg to closed frame hsgs in mid May of '71. Have pulled a bunch of "928"s over the years off of original '71's & '72's. Believe Steve V had a 1E20 dated "928" for sale, if your Formula is a Norwood build, a late May built alt would be correct.

On the fan, it's an early 2nd Gen Firebird V8 AC usage fan, A-B-G series use a slightly larger diam, something the eBay hacks don't seem to care about in their product listings. Have prob 6-7 dozen boxes of original fans cycling there way to my building, all have been stored in beef boxes standing up.

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Old 09-01-2017, 04:40 PM
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TA455HO TA455HO is offline
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Could Todd's have been the 80 Amp by any chance? He said A/C but could there be more to the story? Possibly power windows or electric rear window defroster (grid in the glass, not blower in the deck) also? Any other combinations that would get you that setup? The 80 Amp alternators were not open face.

Just wondering...

Chad

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Last edited by TA455HO; 09-01-2017 at 04:45 PM.
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Old 09-01-2017, 05:00 PM
'ol Pinion head 'ol Pinion head is offline
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If grid type rear defroster with factory AC, yes would take a "1015", specific alt brackets, & idler pulley setup. Def a tough to find 1015 alt core, as very early usage, hope that's not the circumstances Todd is dealing with.

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  #7  
Old 09-01-2017, 09:27 PM
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A/C and Power windows will get you into a 1015 Alternator as well ( 80 amp)

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Old 09-01-2017, 11:34 PM
Todd Mullin Todd Mullin is offline
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Hope to get the 1E20 from Steve V. My car do's have 24 options but no power windows or rear defrost.

Thx Todd

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Old 09-02-2017, 03:49 PM
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Bentwheelbob Bentwheelbob is offline
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Todd - The rear AC bracket is an HO only part that isn't currently reproduced. Barry at Sonic Motors in Detroit reproduced some years ago and as of last weekend at the TA Nats still had a few left. Google him up and give him a call.

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