1969 BOSS 429 Autolite Alternator C9ZF-10300-E (after February/March 1969)

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Description: C9ZF-10300-E Autolite Alternator
Year: 1969 (sometime after 2/1969) see notes below
Engine: BOSS 429
Power Steering: Yes
Air Conditioning: No

Model: Mustang BOSS 429

Production date specific: YES, sometime after February 1969
Engineering #: C9ZF-10300-E
Rear housing type: Teardrop AUTOLITE
Output specified on ink stamp: 55 Amps
Actual output: 55 Amps
Fan: 13 blade (sold separately)
Pulley: Single sheave 3.87" C5AF-10A352-H (sold separately)
Date Codes: 3 (Indicate your cars production date when ordering)
Warranty: 1 Year

Accuracy Rating: 9.5
Best Repro Available: YES

Jack's Comments:

Our concours correct 1969 Autolite alternators are built with 100% new components manufactured to our specifications to be reliable and look factory original.  We faithfully reproduced the unique front and rear housings from original Ford engineering drawings, 28 lamination yellow/amber varnished 55 amp stator and we even apply date codes that correspond with your cars production date.  Our alternators also come with all the concours correct hardware you need to install your wire harness and fan/pulley.

BOSS 429 Concours Notes:
1) Regular production cars produced from the start of 1969 production until the end of February 1969 production came equipped with a AUTOLITE teardrop style rear housing with two Autolite ink stamps on the rear housing. Boss 429's tend to lag a little behind regular production when it came to the change from the ink to die stamped alternators.
2) Around the the start of March 1969 we start seeing die stamped Autolite alternators in regular production cars but we have seen ink stamped alternators as late as March 24th 1969 in BOSS 429's. Depending Ford and Kar Kraft's inventory turn you could see either a ink stamped or die stamped alternator around the change over date.  What we are trying to say is there isn't an exact date the change over occurred so you will need to decide what is right for your car. If your BOSS was build around the change over date send us an email or give us a call and we compare our records of documented original BOSS 429's with yours to help you make a decision.
3) The red Autolite ink stamp color identifies this as a 55 amp alternator.
4) The correct cooling fan has 13 blades and it had a yellow zinc plating (also known as zinc dichromate).
5) The correct pulley for this alternator is the large 3.87" C5AF-10A352-H single sheave pulley with a yellow zinc plating (also known as zinc dichromate).
6) The wire harness terminal and nut/pulley hardware had a yellow zinc finish in 1969 (concours correct hardware included).
7) 1969 BOSS 429's did not get the wire harness retaining clip that regular production Mustangs all had. It would only have the cloth taped on plastic clip that holds the harness to the ground stud (not available).
8) Just like the factory alternators we apply a tiny dob of light brown sealer seen on the rear housing between the rear bearing hub and the FLD terminal. This was used to seal a small hole that allowed a pin to be inserted to hold the brushes in place during assembly.

Do you have more concours details you would like to share?  Pictures?  We don't know everything so please send us an email and we will post your findings and give you the credit.

Questions & Answers:

Q: How do you decide what date codes are right for my alternator?
When you specify your BOSS 429's production date we take a look at our vintage calendars and select a day one to one and a half months before your car was built.  If you would like to specify a date you want your alternator stamped with just let us know in the Special Instructions: box.  Note: The stator was manufactured before the alternator itself so the stator inspection date is typically 7-20 days prior to the alternators two final inspection dates. 

Q: Where are the date codes located on the alternator?
A: Month, day and shift on stator. Shift, month, day, last digit of year on the side of the rear housing.

Q I'm running a NOS mechanical voltage regulator. Will this alternator make my regulator malfunction like the last alternator I purchased at my local Auto parts store?
A: You won't need to buy another voltage regulator. We build our alternators with components that are compatible with vintage mechanical or the new solid state voltage regulators just for this reason.  Note: Voltage regulators are the most common reason your battery is not charging or over charging.  We suggest you install a new solid state voltage regulator with your new alternator just to be safe.

Still have questions?  Give us a call at 510-903-1059


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