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#1
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1970 open face 55A alternator
Slowly working towards reinstalling the A/C on my 1970 Formula. While a lot of the system had been removed by the previous owner, he had carefully packed up and stored all the original brackets, compressor and condenser from the car. The one thing for sure that wasn’t there is the correct alternator. Not sure if the current unit is even 55A. For those who are familiar with rare & used parts I have several questions.
1) What would a 1100903 55 A alternator sell for? I realize that ultimately something is worth whatever somebody will pay and that Ebay skews values up, but I'm asking for a ballpark number that those in the know would think fair and reasonable. 2) How much of a unicorn is one of these? Are they something that at least pops up once in a blue moon or are they so scarce that "knowing a guy who knows a guy" is the only way you're ever likely to find one? 3) Aside from the proper cases, are there any other specific parts or telltales to look for that prove it's authentic and not just a Frankenstein? 4) If you couldn't find a real one, are the correct open front and proper rear casings out there to at least dress up a newer or different model Delcotron to appear correct? As always, thanks in advance for any input or suggestions you care to make. Dennis |
#2
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903
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#3
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903
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Last edited by Ramairnacho; 08-18-2022 at 03:33 PM. |
#4
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#5
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A 903 55 amp alternator with correct back has a limited market. That said, its mostly cars with AC. Still sell well, but lots are now just flipper material, or swap meet vendors want a conversation piece.. yeah many do that.
IF you have it, and it looks the part, run it and look for a 904 . No need to collect stuff as the cars needing originals is Not going up in number . With parts available today you can make ANY 10Si alternator have 75 to 130 amps. There is no need for more than 61 amps, and that is only needed driving at night with ac on max.
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"The Future Belongs to those who are STILL Willing to get their Hands Dirty" .. my Grandfather |
#6
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Most of those rear cases were changed over the years as I have been told there were issues with that heat sink?Tom
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#7
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my original 902 has a crack in the rear bolt boss;
I still have it, but I put it aside and swapped in a later rear case so that I could tighten the rear bolt. I don't know if that's a common thing or not, but it might lend to clear up why the rear cases go MIA.
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
#8
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The front spokes crack near the middle..
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"The Future Belongs to those who are STILL Willing to get their Hands Dirty" .. my Grandfather |
#9
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I think I have 3 open face Alts here with the wrong backs.Tom
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#10
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Depends if they are 902/903s or 927/928s. The 927/928s had the later rear case that did not have the raised fin area. Those rear cases are common.
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1968 Firebird 400HO convertible 1971 Trans Am 4-speed, white/blue |
#11
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Bean counters.. cost to make the replacement was I think 15 cents less, or something close..
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"The Future Belongs to those who are STILL Willing to get their Hands Dirty" .. my Grandfather |
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