67 firebird rear question

69L72RS · #1 04-23-2010, 04:38 PM

I have a 67 firebird housing that has a large "N" cast in the cop of it. Is this for nodular like for the ford rears? It is a dual traction bar rear that had the HD 4-pin posi and 3.55 gears.
I have had other dual t-bar rears that didn't have the "N" in the past.
One person told me the "N" housings were only used in the 400 CID 4-spd RAM AIR VI cars.
I don't know anything about pontiacs and am trying to determine if this is a special rear or not.
Thanks in advance for your help.
Eric

**Fast67VelleN2O** · #2 04-23-2010, 05:15 PM

What is a ram air 6 car?

69L72RS · #3 04-23-2010, 05:41 PM

Told you that I didn't know anything about pontiacs.

It should be ram air IV I guess.

Keith Tedford · #4 04-23-2010, 05:50 PM

I don't know about the rear end, but the Ram Air II didn't come out until mid year '68 and the Ram Air IV cars were '69 and '70.

**PeteLeathersac** · #5 04-23-2010, 06:38 PM

If the below linked site is correct, any '67 Ram-Air 400 cars had the 'UT' 3.23 , 'UX' 3.90 or 'YL' 4.33 rears only..

http://www.firebirdgallery.com/67codes.htm

So regardless of the 'N' casting, check your housing stamp and if a 3:55 stamped UW it's a cool rear but not from a '67 Ram Air car..

Weren't the GTO & Firebird 6-Speed showcars built five or so years ago called Ram Air 6 cars?.

~ Pete

marxjunk · #6 04-24-2010, 01:14 AM

The nodular rear was a heavy duty option,but came on a lot of 4 speed cars....really tuff to get,,really expensive if you need one. Ive had 3.55 posi rears, and they werent nodular,they are the top performance rear..and they made Ram Air I birds in 67,,and it would be this type of rear in it, but 4.33s where standard. Has a better 4 pin posi that is heavy duty too...

**iluv69s** · #7 04-24-2010, 04:48 AM

Hey Eric, I know Pontiac did make the Nodular rears with the N cast in them. I owned a 68 GTO that had one in it. It also was a 3.55 posi. As far as the bird rear, I have owned about a half dozen of them dual bar rears/cars and have never seen or heard of one(nodular rear) in a bird. But, obviously they made them. I just keep on learning.
I assume it must be rather rare...the Pontiac site might be a good source to check. Let me know what you find out, ok. Cool stuff !! Max

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