Option 628 fast ratio manual steering

20:1 standard on Australian A bodies. utes, Hard top, 4 door, 2 door coupe....
Aussie R/T chargers, but only "Track pack" equipped cars got 16:1 we are talking race and semi race spec cars. we are talking 500 - 1000 or so made.
and Police could have it if they wanted it.

The aussies used a short "truck length" worm shaft and a longer steering column shaft to stop you putting the race 16:1 steering box easily on a street car. this was dealer/racer/race team kit

I looked for ages for a US Dart 16:1 ballnut and worm screw becasue it would be the standard normal length.
I wanted to fit 16:1 nut and screw into to my Right hand drive steel cased standard austrlian 20:1 box and never ever found one.. they must have been really rare in the US or wore out quickand were scrapped

eventually got a new one from firm feel when they started making them again. I reconfigured it for RHD and built it into a RHD case. 16:1 RHD box without having to pay Austrlian price for a rare race only R/T charger box (about $2K for a worn out POS)

blabbed all this on the aussie messageboards should have kept my mouth shut.. i could have been a millionaire by now. :)

20:1 manual I think was used on some export barracudas,
This is a guess based on having purchased 20:1 parts (ballnut and worm screw x 2) from the US marked as RHD, hence cheap to pick up on US ebay...!
and the Main RHD mopar export to UK/Aus/Jamaica etc was the 67/68 barracuda

Chrylser US made 20:1 RHD parts or should i say put 20:1 ratio parts in boxes with the right hand drive part number. There aint no physical difference to the component parts but the part number so keep that in mind if on the hunt.

Right hand drive and left hand drive ballnut and worm screw components are the same. Just the RHD one has the Ballnut on upside down compared with a left hand drive USA configured one, This to facilitate mesh with a Sector shaft teeth in a "mirror image" steering box case.
hence the different part numbering but you can swap that about.. just don't lose the ball bearings.

Manual steering box rebuild is easy enough to do....there is practially nothing in there, and you can get the parts. build it with 2, i.e 1 extra, OR one big long 16mm rather than 12 mm lower sector drawn cup bearing and you have made it a "super" heavy duty box, the extra drag on the sector helps stop it chattering its teeth...thing just lasts longer

Dave