I can buy a set of 10" drum brakes for the front brakes on my '66 Valiant.
Has anybody gone from 9" to 10"?

I did. I raced my '66 with 9" drums on front and 11" on back. When the car was only running 90 in the 1/4 it was spooky to try and stop for the first turnoff at most tracks. I put a set of 10" off a '71 Demon on and it was much better. I am now putting 10" on back to get rid of those heavy-azz 11's.

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Official Cookie and Mater Tormentor.

I have this on my 62 valiant--- rears are the original 9" & the fronts are 69 dart 10"style-- single pot m/c. when 1st swapped I stopped much better than the 9".

I just did reline the 10" drums & they seem to work ok--but----

My son will be 14 in Feb. & I know that teen drivers do not always think about stopping --so I am contemplating the swap to disc brakes
just do not want to give up the small bolt wheels I have.

If you have the parts it is better than 9"-- but if your buying them -- you might want to check into disc brakes,
Lawrence

There's nothing wrong with 4 9" drums..........

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

Thanks for the replys.
I was looking to know if anyone else had done this and if there was a difference and if the difference was worth the trouble.
The 9" drums are ok but a little more stopping abblity would be great.

Must be a full moon, because you're getting a lot of noise in response to a straightforward question with a straightforward answer: Yes, it's an easy and commonly-done swap, and the 10" drums are considerably better than the 9" drums. 10" on the front and 9" on the rear isn't as good as 10" all around, which in turn isn't as good as discs up front, but even just putting the 10" brakes up front will make a large improvement in the car's stopping.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

I did it on my Barracuda and it was definately an improvement over the 9 inchers. However, if you are planning to keep this car for a long time and actually drive it a lot in modern traffic I recommend skipping the cheap solution and going straight to front disc brakes. In the long run you will have a safer, better stoppping car and the cost won't be that much more.

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"Former Owner" of '65 Barracuda, 225, Auto, MP 2bbl intake, MP cam, Dutra Duals. Presently Moparless.

What's involved in the 9" to 10" swap besides drums and shoes???...backing plate??..wheel cyl. and springs?? ...retainers?

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Super Six Conversion Stromberg

Everything from the backing plates on out must be changed. Seems to me the spindles, too, must be replaced, but it's late at night, I didn't get much sleep last night, and the red "OIL" warning light in my head is solid red, so somebody else will have to answer that for you.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

To do this swap--- remove 10" brake assembly from the the lower & upper ball joints--- do the same for the 9"
.
The rubber line will have to be the 10" version(different wheel cylinder fitting)-- the 9" might work --but I went with the 10" style.

The spindles /backing plates & rubber lines are different as are the internal springs,shoes etc...
Lawrence

The 10" drum brake spindles are different from the 9" spindles because they have larger wheel bearings, better to handle the extra weight of the V8, but does anybody know if it is possible to bolt an entire 10" drum brake assembly with backing plates, drums, the whole works etc. onto a 9" hub? The thing about the 10" hubs is that the walls are thinner where they stick out past the wheel (larger diameter outer wheel bearing cup, but same center hole size in the wheel...), and so are more easily damaged if you hit a curb or if somebody misses the dust cap when smacking it on with a sledge hammer and hits the hub instead.

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1964 Dart 225 1966 Valiant 225
1966 Dart 273 1966 Barracuda 273
1969 Dart 225
'64-170 engine '66-170 engine
(two) 198 crank/rod sets in custom-fitted wooden boxes

wooden motor scooter with hybrid-electric drive

Dusty-- no/yes-- the bolt holes on the 9" set-up do not line up with the 10" set-up-- if you were to drill your backing plates then maybe. also the 10" later backing plate does not work with the earlier style-- I'm guessing 72 year cut -off 73 -- up is different. Lawrence