hi all! (again) what would be the proper ID numbers on an alternator for my 1971 GS stage 1 car built in Dec (3rd week) of 1970? thanks john
There no way to answer that for sure since they just picked whatever was on the shelf. If you get one within 60 days I cannot imagine anyone raising an eyebrow. Just get the correct number. As I recall being a stage 1 has no effect on the correct number. On some whether you have rear defrost does.
John asks, "What would be the proper ID numbers on an alternator for my 1971 GS stage 1 car" The part number that is stamped into the alt would be 1100891. It would have the double pulley and it would have a date code like Jim describes. Duane
A pic always helps................ ID chart at www.atlantabuick.com Also a order blank for Duane's Date Code Book.. yea I know...another shameless plug..... :TU:
David, So that's the pic you took of my alt, you can even see the application letters. Nice pic. Duane
Your Alt.........I found it on this car.........:laugh: :laugh: :laugh: Congrats on the 400....:beers2: I understand when you order the H5 Heavy Duty Battery after 1/1/71 it came with a flash light............:grin: :laugh:
the best i can read my number is 1100805?32A 1L3 18VNEG the second row is very hard to read. i am goingto order the bood from duane but i was wondering what i do have. also are all 455 alternators, exhaust manifolds and intake manifolds the same? none were stage 1 specific right? john
No manifolds etc are not all the same. They may vary some by date and intended model. But I do not they the stage 1 option had any effect on this. You might want to post a pic. In general 32A = 32 amp . If so that is a non Riv case. 12v = 12 volts 119085 = model number foir the unit
thanks for the help. now i will track down the right one. do you think that some of these places like Wheatbelt and desert valley auto will look for specific numbered alternators? i do not think so. also duane...why would it have a double pully. the car is not an AC car. wouldn't a doulbe pully be for an AC equipped car? john
Here is the question "also duane...why would it have a double pully. the car is not an AC car. wouldn't a doulbe pully be for an AC equipped car?" According to Buick, by definition every 71 Stage 1 engine came with heavy duty cooling, therefore regardless of whether it was AC or non-AC, it came with all the AC style pulleys, AC water pump, and would have had the double pulley on the alt. If you think about this logically, this allowed Buick to stock less "varieties" of the Stage 1 motors. Logistically it made more sense to "toss in" the added expense of AC pulleys (which was probably pennies) to decrease their inventories. Duane
so duane the check is in the mail for the book. but can you help me in my search for the correct alternator now? what would the number be (is it the 1100891 number) for a 1971 GS stage 1 car built in dec 1970? i would think that the number should be for a 1970 alternator right? john
John, Do not confuse model years with calender years. The part number for this and many parts are based on the model year, therefore it doesn't matter when your car was built within the production run, all that matters is it is a 1971 model year car. Now so there is no confusion, for a (3rd week of December, 1970) built 1971 Stage 1 A-body GS, you are looking for a 55 amp, double pulley alt with a part number of 1100891 that was built sometime between the last half of November and the first week of December 1970. Duane PS. When you get my book you can look at the calendars and see which dates would be correct.:laugh:
Just look for someone parting a 71 Skylark with AC. They have the same alternator if it is original. That is how I found one. The one I found was date coded July of 70 but had the 71 part #. Strangely it was on a February 71 built car. Quite a spread in time.
Interesting.............. 1100805 Stamped Alt. shows to be late 60's to mid 70's out of the Delco Agricultural Division...uzzled: Is there a V8BackHoe.com board??????:laugh:
i will check the info when i get the book. i had no idea that all of the stage 1 cars had doulble pullies even if they were not AC cars. thanks john
John, get a 71 assembly manual and it shows all this information as well as having diagrams. Many double pulleys were lost when originals were traded in as cores and people wondered why belts no longer fit?
thank you for all the help. the car is in great shape but i just want to make it as original as possible. i have alot of the old racing stuff ( like modified carb, intake manifold and exhaust manifolds) that were used on the car when racing. but i would like as much date coded stuff as possible. thanks john
