My 1969 Roadrunner pics from Ebay

[A31PKG]

With a 26" core support - and non a/c - it should be an axle package car, 3:55 or 3:91. The ad says 323 open rear.... Just curious if someone changed the rear end?

...or the core support...?

That thought crossed my mind too, but I'm assuming the body numbers all match?

Anyway, all three ratios have their good points. The 3:23 is a great hiway gear and very common in the MOPAR world. Lots of perfromance b-bodys can smoke the tires with a 3:23 gearset...and get decent MPG. The 3:55 is a step up performance-wise. If you have a nice street/strip build, I'd say go with the 3:55's. The grandaddy is the 3:91's. I've driven my car on a couple long trips with these gears, and as long as you keep it around 55 or so, you're good. Yes, MPG will not be the greatest (probably 6-10 hiway), but you will still be able to enjoy nice healthy launches when the time calls for it!

 

[Big John]

I think remembering the seller saying he believed the previous owner changed the rear. What is a 3:23 open? Is the 3:23 used more for easy highway driving? I want to get a peppy car that can be run strong but still be able to travel to shows.

Going back to Corvettes, I changed my gears from 3:55 to 3:70 by just changing the gears. Used with a 700R4 trans allows me to run hard/fast and drive long distance. Can I do the same, change the gears to 3:55, 3:70 or 3:91?

I still have too much to learn. I'm keeping all the info I'm receiving from all of you and I will be able to get a good jump on finishing this car.

Thanks,
Barry

One of the cool things about the 8 3/4 rear end is you can have a selection of center sections (or pumpkins) to change at your will. 3.23 or even 2.76 for that cross country drive or 3.91 or 4.11 for the day at the drags. It's a pretty simple swap and after you do it a couple times, it can be done pretty fast.

 

[glhcarl]

Some other clues to a non A87 car. Steering wheel does not have the RR decal or chrome horn ring, just a big pad in the center. There are no rear seat arm rests or chrome trim under the front arm rests.

Brief thread hi-jack: Carl, where have you been hiding? What's going on in your neck of the woods? I assume that you will be at the NGMC meet in Brazelton on Sept. 10? I think I will try to make it up there for that one. Did I mention that I met another one of your members? David Elder lives across the street from my buddy George out in Bogart. I'm sure you know him, he's mostly an A-Body guy, but he has some other stuff too. Now back to your regularly scheduled programming.

:jester:

I will be there!

David is a great guy.

 

[moparstuart]

another car for team RED

 

[nicanor]

ACME A12,

The car does have a Belvedere steering wheel with no RR button for the horn.

But there is stainless steel going up both sides of the post.

There is an A87car and an A12 car. Whats the difference and is there a designator for my Roadrunner line A12.

I'll order front seat covers.

What do I need to order to go with the headliner so I have all the components, (headliner, insulation, brackets, screws, trim molding) or anything else I need for an install package of a headliner.

Thank you,
Barry

 

[moparchris]

The A87 and A12 you are refrring to are codes found on the fender tag that indicate what options the car has. The "A" series of codes usually denotes a package of things included in that option. For instance A31 is the performance axle package. It includes 3.91 gears with Sure Grip, 26 inch radiator, and viscous fan coupler with shroud. The A12 package comes with the 440 six barrell engine, Hemi trans, Dana rear with 4.10 gears and Sure Grip, and lift off fiberglass hood. The A87 package is the custom decor interior package and comes with the deluxe vinyl seat covers, I think chrome arm rest bases, loop carpet, and deluxe steering wheel. I am no means even knowledgable but I have heard a few thingsover the years. Out of the 100 or so members I bet there are at least 50 of them that know way more about this than I do. I recommend some light reading in the reference section there is volumes and volumes of great accurate info in there, its one of the best things about this site except the occasional ball busting! Enjoy!!

 

[A31PKG]

...A31 is the performance axle package. It includes 3.91 gears with Sure Grip, 26 inch radiator, and viscous fan coupler with shroud. The A12 package comes with the 440 six barrell engine, Hemi trans, Dana rear with 4.10 gears and Sure Grip, and lift off fiberglass hood.

And two extra half leaves in the right leaf spring.

 

[Big John]

...A31 is the performance axle package. It includes 3.91 gears with Sure Grip, 26 inch radiator, and viscous fan coupler with shroud. The A12 package comes with the 440 six barrell engine, Hemi trans, Dana rear with 4.10 gears and Sure Grip, and lift off fiberglass hood.

And two extra half leaves in the right leaf spring.

And 15" wheels with chrome lug nuts and red line tires.

 

[A31PKG]

quote] And 15" wheels with chrome lug nuts and red line tires.[/quote]

Only with A12...

A31 & A36 got the 26" radiator, viscous fan w/shroud, 8 3/4" rear with either 3:55 or 3:91 gears, & the two half leaves.
The wheels & tires were up to the buyer.

For the benefit of those who don't know: The A12 got the same cooling system and suspension as above, but with a 4:10 Dana, the wheels & tires Big mentioned, plus the lower control arm bumper spacers.... oh yeah, and obviously the 440-6.

I am pretty sure the part numbers for the radiator, leaf springs, & fan w/clutch for all performance b-bodys with an axle package were the same regardless of the engine installed. I'll have to research that...

 

[69hemibeep]

According to my source the 69 hemi b-body had an 18" fan #2863215 and 440 6bbl used the same fan on the 4spd cars the 440 6bbl auto used an 18.5" fan 2863216 along with non A/C 383s. The hemi and all 440 6bbls used a fan clutch 2806070 and again not the 383s. The 383 A/C car used an 18" Fan 2863224. An A/C 383 fan clutch was 2658456 and non A/C 383 used 2863260

 

[A31PKG]

My BS is coded for the 070 fan clutch. The parts catalog also calls for it. The fan part numbers were a bit confusing tho...

 

[69hemibeep]

My BS is coded for the 070 fan clutch. The parts catalog also calls for it. The fan part numbers were a bit confusing tho...

I have to believe a BS over a book!

 

[SomeCarGuy]

Depending on the build date, that car may have not came w/ headrests.