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#74923 03/16/2007 11:47 PM
Joined: Jun 2005
Posts: 887
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Shop Shark
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Joined: Jun 2005
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I'd like to reduce the number of turns lock-to-lock and move the steering wheel closer to the dash so, I'm thinking about cutting the old steering box on and using a reveresed corvair box connected to the original colum by means of a borgesen joint.

Does anyone know how many turns, lock to lock, a corvair box uses? Also does can anyone think of any reason not to use a reversed corvair box?


'51 Chevy 1/2 ton w/'62 261, HEI, offy, fentons, dual carter/webbers, t-5 & 12 bolt posi
Joined: Dec 2006
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'Bolter
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They can be spendy is one reason I can think of. I was trying to get either a corviar or vega box for my project car & they are in high demand. hence the places that sell them new tend to chqarge what the market will bear,...
Flaming River has a great tech dept., so if you have particular questions droppin them an Email should get you solid answers, and price estimates.

What I did end up using on my car was a late 60's Ford Mustang box. Has fewer turns than a stock corvair box and is much easier to find.


1956 GMC 370 dump " 'Tater "
1970 VW Volksrod "the Black Bomber"
2007 Chevy Avalanche
2020 Jeep Cherokee Trailhawk,
2005 Harley Davidson FLHTCUI

I dig all cars, old and new, whether they were hammered out of American iron, German steel, or Japanese tin cans. Being unable to appreciate them all is missing out on a world of great things.
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I searched a little more on-line and a reversed corvair box has 3 1/2 turns lock to lock, which is one full turn less than the original steering box.

The stock corvair box would mount top of the frame rail and has the pitman arm on the engine side. (in the corvair the box is on the side of the frame and the pitman arm is underneath).

Here's the original coravir box:

[img]http://www.speedwaymotors.com/eccStoreFront/product_images/2005/91032219_1_T.jpg[/img]

When you reverse the corvair box, it mounts and works just like the original AD box, on top of the frame with the pitman arm on the outside of the frame. All you'd have to do is cut the steering column, put a bearing in the mast jacket and use a rag joint or borgensen joint to connect the stock original steering shaft to the reversed corvair box.

Here's a reversed box:

[img]http://www.tperformance.com/category_pics/large/TP23T80.jpg[/img]

Reversing a corvair box is very easy if you find one in original condition. Basically you take the worm gear out, put a 15/16 freeze plug in the hole that the steering shaft used to stick out of, then you drill a 11/16th hole in the threaded cap at the other end of the steering box, put in the seal from where the steering shaft used to come out of the box, put worm gear in the box, put the bearing in place, put the newly drilled lid on, and you are up and running! Here's a link to an online article photos on how to reverse a corvair box.

I've found reversed corvair boxes on the internet for around $150, and used non-reversed ones for around $75, which is not bad considering a rebuild kit for the original box is around $120.


'51 Chevy 1/2 ton w/'62 261, HEI, offy, fentons, dual carter/webbers, t-5 & 12 bolt posi

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