1967 427 428PI, GT500 Autolite Alternator C6AF-10300-C (built before Dec 1966)

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Description: 427, 428PI, Shelby GT500 Autolite Alternator
Year: 1967 (built before Dec 1966)
Model: Shelby GT500, Ford, Mercury

Production date specific: YES, all production before December 1966
Engineering #: C6AF-10300-C
Rear housing type: Round
Output specified on ink stamp: 42 Amps
Actual output: 55 Amps
Fan: 13 blade (sold separately)
Pulley: Double sheave C5AF-10A352-J (sold separately)
Date Codes: 3 (Please indicate your cars production date when ordering)
Warranty: 2 Years (repair or replace)
Returns: 365 Days* 

Accuracy Rating: 9.5
Best Repro Available: YES

Jack's Comments:

Our concours correct 1967 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 yellow/amber varnished 38 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 the wire harness and fan/pulley.

Concours Notes:
1) Alternators produced for the 1967 model year until November 1966 are just like the 1966 alternators except a second Autolite stamp was applied to the rear housing and the final inspection date code was moved to the back of the rear housing. If your car was produced before December 1966 this is the correct alternator for your car.
2) Sometime around December 1966 Autolite alternators changed over to the teardrop style rear housing. Depending on each assembly plant inventory turn you could see the round or teardrop rear housing in production cars until late December 1966.
3) Starting in 1967 all alternators had two Autolite stamps on the rear housing. The orange Autolite ink stamp color identifies this as a 42 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 a double sheave pulley C5AF-10A352-J2 with a yellow zinc plating (also known as zinc dichromate).
6) The wire harness terminal and nut/pulley hardware had a yellow zinc finish starting in 1967 (included).
7) The tiny dob of light brown sealer seen on the rear housing between the rear bearing hub and the FLD terminal 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?  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 it 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 date by locating date codes on your engine, rear axle or sheet metal parts and add a one to two months to the latest date.  You then enter the date you calculated before adding the alternator to your shopping cart.  Shelby owner? You can contact the Shelby Club for more information about yours cars build date or use the previous described method to estimate your Shelby's production date.  If you don't have any build date information or just don't care indicate that you want a generic date code.

Q: Where are the date codes located on the alternator?
A: Month, day, year stamp next to the Autolite stamp, month, day and shift on stator, month, day, last digit of year and plant code on rear housing

Q What do yo mean actual output is 55 Amps?
A: The factory specified 427/428 with cars required an alternator that has a maximum output of 42 amps.  The Autolite stamp will state the factory 42 amp output but we build all our alternators to put out between 50 and 55 amps so it can support some of the modern accessories available today like larger stereo systems and MSD ignition.

Q. I have a 1967 Shelby with the amp meter in the console. What terminal do I connect the wire lead from the gauge to?
A. It connects to the STA terminal.

Q I'm running a mechanical voltage regulator.  Will this alternator burn up my regulator 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 preferred) 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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