Who sells different steering gears for 64year Valiant manual steering box.Like to have 16:1 or 20:1 ratio

I think Mancini still sells a 20:1.

I believe Mancini's is just the worm and sector gear, you install. However, they show no price for it, so call first.

As for a whole box, good luck. Firm Feel will rebuild yours but if you don't already have the ratio you want you are stuck with what you have.

To the best of my knowledge, no one has a stock of better ratio gear boxes or gears to convert yours. So it's Ebay, Boneyards and such to find a suitable unit.

There are (or at least were) problems with the 16:1 and 20:1 gear sets. Call the guys at Firm Feel for the full scoop. From what I recall, the mfg of the gears lost their quality control mojo and started to make junk. The gears can lock up your steering box which wouldn't be a good thing to have happen. The guys at Firm Feel are familiar with the issue and they can tell you if the problem has been fixed, or if there is a fix.