Read thru this post thread and you will see the problem(s) -

https://fordbarn.com/forum/showthread.php?t=358849

CLICK HERE - Both LINC and MERC used the same basic system during this period.

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https://www.jalopyjournal.com/forum/threads/getting-rid-of-the-treadle-vac-on-a-budget.1285428/

Here you go.

miker
55 bird, 32 cabrio F code
Kent, WA
Tucson, AZ

THANX MIKE!

If you read the H.A.M.B. thread closely, what the guy did was simply upgrade from TREADLE-VAC to a diaphragm booster.

The BOOSTER/MC combo included a SGL RESERVOIR MC (bore size not given) so he must have retained the OEM drum brakes. He did not split the hydraulic system which is commonly the reason for the upgrade. Why bother? Just have the TREADLE-VAC gone through.

While this combination may power the original drum system (no line pressure - MC volume documented),

... it is in no way going to properly power a DISC/DRUM SYSTEM of any style.

EDIT - Let me interject here meaning a brake overhaul using quality parts and not box-store off-shore junk) .

BRAKES and modifications have to be taken seriously. Most of these so-called 'BRAKE KIT MAKERS' are dangerous (IMO).

Case in point. This guy had previously modified the car for better braking, He let it sit. He then increased the power and the new power overcame the braking system (and yes, most of it was his fault) ...

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Video is quite "impactful".

Brad
Sierra Vista Arizona
1954 Lincoln Capri

I have yet to find a FRONT DISC CONVERSION KIT for the 1954 CAPRI. It does have a unique spindle whereas the MERC style kit may not or will not bolt up or there is just so little demand that no one has offered a kit.

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I think for the time being I'll just keep the drums all around. I put all new shoes and wheel cylinders on. I'd like to put a dual res mc on still. So the new booster and mc is on my list. I thought about a 7" booster but it seems to not be adequate for this car. Just concerned about room to mount it.

Brad
Sierra Vista Arizona
1954 Lincoln Capri

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Dave Gulley of DropNStop might be able to help you with a front disc conversion, including caliper mounting brackets. I don't know about your specific application, but it might be necessary to send your original spindles to him. It's also possible that he can provide spindles that can be used. Dave is located in the Eagle Rock neighborhood of Los Angeles. Here's his number: (818) 445-0431. 

You might look a 7” dual diaphragm unit. It might clear the manifold. I’m guessing the Falcon unit is a single, based on the weight of the car. Guess being the operative word.

If you go that route. There will be some brake line work, and more line work for a dual master. I know guys that make double flares in their sleep, but I’ve never been one of them.

I’m still confident that the 2”x12” front drums are fine for general driving. The treadle vac units usually have rebuild kits available if they’re not badly pitted. It’s hard to price a Capri, but most of them are around $400 for a professional rebuild. All said and done, that’s probably the best path forward.

Last question, did you replace the rubber hoses when you did the brakes? And did the lines flush out ok? Bad hoses or rusted lines are more trouble down the road, or worse, on the road.

miker
55 bird, 32 cabrio F code
Kent, WA
Tucson, AZ