Description: C6AF-10300-A Autolite Alternator
Year: 1969 (after February 1969)
Engine: BOSS 302
Power Steering: With or without
Air Conditioning: No
Model: Mustang, Cougar
Production date specific: YES, production after February 1969
Engineering #: C6AF-10300-A
Rear housing type: Teardrop AUTOLITE
Output specified on ink stamp: 42 Amps
Actual output: 55 Amps
Fan: 13 blade (sold separately)
Pulley: Single sheave (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 BOSS 302 die stamped 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, 19 lamination baked on yellow/amber varnished 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 302 Concours Notes:
1)The 1969 BOSS 302 started production on April 14, 1969 well after Autolite changed over to the die stamped front housing in late March 1969. Understandably there is a lot of confusion about what is the right alternator for the 1969 BOSS 302. Most assume it came with the 55 Amp C9ZF-10300-E die stamped alternator and the large 3.87" C5AF-10A352-H pulley that was on the 1970 BOSS 302 and it's what the MPC called for as a service replacement after 1969. Research by Bob Perkins indicate that all 1969 BOSS 302's came from the factory with the 42 Amp C6AF-10300-B Autolite alternator and the 2.88" C5AF-10A352-L pulley (pulley not 100% verified yet). Bob did leave the possibility that very late production 1969 BOSS 302's had the 55 Amp C9ZF-10300-E 55 amp alternator with the large 3.87" C5AF-10A352-H pulley. He notes the heavy duty battery option still had the 42 Amp alternator. We have posted the C5AF-10A352-L pulley so you can see what it looks like. The closest reproduction available today is the 2.62" single sheave pulley.
2) The orange sprayed on ink stripe color identifies this as a 42 amp alternator.
3) The correct cooling fan has 13 blades and it had a yellow zinc plating (also known as zinc dichromate).
4) The correct pulley for this alternator is a 2.66" single sheave pulley with a yellow zinc plating (also known as zinc dichromate)
5) The wire harness terminal and nut/pulley hardware had a yellow zinc finish in 1969 (concours correct hardware included).
6) 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 car?
A: When you specify your cars 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: I don't have a door tag on my car, what should I do?
A: If you don't have a door tag to get your cars build date you can calculate an approximate production date by locating date codes on your engine, rear axle or sheet metal parts.  You can then enter the dates you found in the Special Instructions: box before adding your alternator to your shopping cart.  We will use the date(s) you provide us to calculate a appropriate production date for your alternator. If you don't have any build date information or just don't care please choose that you want a generic date code.

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