1940 Brakes

funrunr

Well-known member
Hello, I need to find a master cyl that will fit in stock location that has dual resevoirs. I was told that the 69 mustang has a lower profile cyl and it might fit? Instead of buying another one on a guess, I would like to go the tried and trued route. I bought my disc brake conversion from Magnum axle and they said that 79-87 chevy would fit, but I can't get the lid open in the stock location without modifying.
Please pass along any tips you may think I could use.
Thanks, Mark
 
I've done this numerous times and it has worked out very well.

www.mr40s.com has a nice drop down adapter for the stock 40 pedal setup - you then use the appropriate year Mustang drum-drum or disk-drum MC. Just ask them and they will tell you what one to use. I have this same setup in my 40 coupe now - I'm using DB up front, no power.

Presently I'm using this same adapter in my 40 p-up project but I've also added a power booster through another adapter. THe wife would love to drive this truck and she is more familiar with PB vs non-power.

This unit will be too long/heavy for just the drop down adapater and I will install another support off the MC mount up to a bar off the frame rail(s). Here are some pics to gve you an idea of the adapter and my setup ....
 

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On my '36 with '39 pedal assy I used a low profile Wilwood dual res. from Summit Racing. I tried the Mustang but it was too tall and hit the floor pan. It's a little pricey but worked great. Make sure you get a 1" bore.

wil-260-8555p_w.jpg
 
Thanks for the input so far, as with TomT's looks like it would solve the problem but I would need to add a new hole in the floor to check the fluid.I am leaning more towards gkgeiger's solution being able to keep everything simple, the car has a new floor and I don't want to cut it.All three solutions are definately good ideas and iI appreciate them all. Thanks,Mark
 
Thanks for the input so far, as with TomT's looks like it would solve the problem but I would need to add a new hole in the floor to check the fluid.I am leaning more towards gkgeiger's solution being able to keep everything simple, the car has a new floor and I don't want to cut it.All three solutions are definately good ideas and iI appreciate them all. Thanks,Mark

With the drop-down adapter you can fill it from underneath - it's what I do.
 
My suggestion for the MC is NAPA #39037, 7/8" bore and ports are facing the frame.About $41. Used this MC many times for disc - drum and disc-disc with no problems (stopping).
 
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