Part # for Disc/drum master cyl. with 1" bore?

[Greasey Harley]

I I just did a front disc conversion on my '68 c10 and really don't want power brakes.
Anybody happen to know a good part number for a Disc/Drum master with a 1.00" bore?
I have read that 71/72 c10s came Non-power disc/drum brakes, but I haven't come across a part number..
I can only find (and have installed) a 1.025' bore master. I have tried multiple parts houses. I can drive it, but the pedal is pretty darn stiff. I don't think the wife would like driving it much.
Not really into Brembo, Willwood or Corvette master cyls. If I can't find the correct one, I will probably have to convert to power, that would be a bummer.
Just want a stock looking, non power setup.

Somebody suggested a 1" bore master off a 1970 Nova, that part is available from Napa, I don't know if that will work though? anybody know if that's an option?

Thanks for any help.
-Russ

[SIXTY9]

I have a stock 72 non power M/C. When I get home this evening I will get you the part number off of it.

Wally

[SCOTI]

I would think going to a smaller bore size will only increase the pressure @ the pedal (??).

[87chevy.com]

It's a trade off from what I've read and researched
. Smaller bore = more pressure but requres more pedal travel.. so if you dont have the travel no bueno.. all can change with pedal ratio but not likely anyone will go that route.

[Greasey Harley]

I came up with this master cylinder, a Napa M1263.

It has the correct 1" bore, but it has a shallow detent, I understand this can be dangerous for manual brake applications.
I'm wondering if I can just pop it apart and drill the detent deeper.
Any reason not to do that? ( Obviously, it will void the warranty)

Ain't quite sure what to do here
-Russ

On the other hand, between the heavy clutch pedal and the big-bore manual brakes, every day is leg day

[54Caddy]

Have a 68 as well and just did this setup. Disc front drum rear with a 1” bore.

eBay item #284107600469

[blazer2007]

won,t the aftermarket ones work like the little 8 inch or whatever they are or are you just trying to look stock ?

[Greasey Harley]

Originally Posted by blazer2007

won,t the aftermarket ones work like the little 8 inch or whatever they are or are you just trying to look stock ?

Very much trying to look stockish (is that a word?) I ditched the shiny aluminum radiator because it didn't look like it came from 1968. I'm gonna modify the cheap Napa MC and see what happens.
It's just brakes, what's the worst that could happen?
...I keep going?

[SIXTY9]

Sorry about being late with the pictures, Things came up. But here they are, The part number is 29881. I used this M/C on my 69 when I converted over to disc brakes on the front. It came off of a 72 with manual brakes, hope this helps.

Wally

[Greasey Harley]

Originally Posted by SIXTY9

...The part number is 29881. I used this M/C on my 69 when I converted over to disc brakes on the front. It came off of a 72 with manual brakes, hope this helps.
Wally

That is some darn good information there, Wally. Thank you!
If I got a part number I can hunt one down.
Thanks for the assist
-Russ