May/2014 was to be the date when the O-axle gears were to be back into production.Nope. Yesterday,I recieved a notice that my long-time order for the O-axle gears has been cancelled,so it sounds like it will be quite awhile yet,or never.
I am looking at another possibility for gears,but if I can bring them to reality,they will be at least $500.00/set. Don't all jump at once.
I am in the process of moving & buying another house,so I won't be pursuing this for awhile.

 

So I should probably hang on to my new in the box 3.42's to supplement my retirement?

 

Same here with a set of Richmond 3.90s.

 

Actually I might use the common 71-up 8.5" 10-bolt corporate posi. It would help with the process. Just alter the pinion program.
There is a few options to look into.
You can have anything made. Someone had these 5:37 O-axle gears made.Maybe I can run a triple overdrive with them.

 

Who wants to sell the 3.42 or 3.90? I feel like someone should have started a business out of the demand.

Sean

 

Brian,
What rear do you have in your 507? I assume it isn't an O-type. Are not the Chevelle 12 bolts stronger?

 

I had the original 8.5" 10-bolt housing in my 72,until 2006. It consisted of 30-spline Moser axles,Eaton posi,3:70 gears,and a W27 cover. I removed it and installed into a different car,and is still going today.
I bought a Moser 12-bolt housing,and built that with 33-spline axles,Eaton posi,3:73's,Strange billet yoke,and a W27 cover that is drilled for the Chevy pattern. I had no reason to build the rear,but I did want the future option to run a 3:55 ratio. In my opinion,the 8.5" 10-bolt and the 12-bolt Chevy are equal in strength,but I prefer the 8.5" 10-bolt due to availability of the housings,and they already have bolt-in axles.The factory 28-spline shafts can take a good amount of abuse.

 

Thanks Brian, that's what I wanted to know.

 

i'm looking for a rear end for my '68 cutlass supreme.need a 3:08-1,with anti spin(limited slip).hope someone can help.i'm in northern wisconsin.thanx

 

Well - I have a chevy 3.08 posi Completely rebuilt. I do not know what you are doing with the car but it will handle all the street you can dish out.

995.00 Housing is VERY clean too blasted primed and painted chassis black.