Debating on getting a Ford master for the 32 project. Only reason is so the brake lines lwon’t cross over each other front to rear. Question being, how deep is the socket on a Ford master where the push rod enters. As well, will GM style push rod work just fine in a Ford master? Thanks Currently like this… Think either of these 1970 unit or 1980 unit
If understanding correct , when Master mounted under & front of master facing towards rear , that the rear reservoir, There should be No cross over of lines Rear port to rear , front to towards front. Some brand corvette has 4 ports , Left or right Exit between master to frame , or Exit to towards Trains . Check with Rock auto , Ford vs Gm Click info on parts brand , Some of manufacturers have many dimensions differentand specs Most 70-80s Disc to drum , bigger reservoir is front brake .
Gm uses rear port is for rears. Ford uses rear port is for fronts. All I really want to know is how deep is the socket where the push rod enters a Ford master cylinder piston.
@Johnny Gee Some brands have more spec then other On Rock auto , Scroll threw each band for same part some show more, I have found that GM , Acdelco has more information per brand & Motor craft I believe same way,, I have seen different depth on plungers Brand to brand , some for even same Application. Also learn to make / use adjustable rod. post above , Sorry , I work on so much diffrent Equipment ,vehicles ,tractors ,farm etc. I might be confused on the GM master cylinder Corvette F & R , all my hot rods I run four wheel disc ( reservoir)
The depth of the pushrod hole varies on both GM and Ford master cylinders, so tough to say whether one will be a direct bolt up for length. I'd probably go to one of the chain parts stores and pick a late 60's or 70's Ford truck mater and have a look at it to compare to your pushrod length. Be sure to check ID of the hole also as not sure if they're the same? I've used both type masters, but usually just cut and fabbed a pushrod to fit.
A long grade 8 bolt with the head cut off makes a good pushrod. If it is longer like the one in your previous picture; I usually use a piece of DOM tube with the rod end in one end and cut off grade 8 bolt in the other, jam nuts on both. The picture of the '80s master in your picture looks like an earlier "Mustang" style drum-drum master and will likely have residual valves in both ports. In any case check which ever master you use to find out what it has in each port and deal with residuals as needed.
Leaning towards the later manual disk brake master. Granada unit to be exact @ a 15/16” bore. Texted a buddy to see if he can get one to his O’really (not in stock) store so I can look at it.
A lot of the Ford masters do come with the push rod, I'll see if I have an old master lying around. Also if you're going disc or drum front, AMC masters ports are on the opposite side and are front port to rear.
Sorry Johnny all I have are stock single or dual drum masters. But I remember that the early Ford Disc master was deep (power disc?). What an adjustable push rod to keep your new pedal ratio right? https://www.amazon.com/dp/B071993884/?tag=atomicindus08-20
I looked at the pic on Rockauto for a 1976 Granada manual and the slot for the dust boot to the end looks like a shallow bore to me. It looks like your last pic in your first post.
The depth can be fixed with the rod you have and I've used the same type round end on Ford, GM and Jeep/Chrysler masters without issue.
@Johnny Gee I will admit I didn't measure and document all the M/Cs I've installed over the years in normal cars. I can tell you that YMM is still important and there are a lot of different ones for both brands. It's not a half dozen covers a decade and all size cars/trucks! And in a bit of poking at Ford, they probably have a bunch of different M/Cs that could interchange but they change something exactly like the bore size and depth for the pushrod. They love doing that.
@Johnny Gee Just asking , Why not just make New rod for your need ? A rod & a Die, vice . Not being smart A$$ . Looks like you have tools. On one car I built I moved Master like 2 -1/2 Ft from peddle attachment made master rod , I used I think 7/16 or 1/2 rod Machined end down to go up in piston cup .
Not that I not able to. It just boils down to I don’t care for the 4 port master cyl the project came with. Second I’ve had enough monkeying around sorting previous issues that were never thought out. So one less mod would be welcomed.
Update. Ford master will take a smooth rod. Depth is 3/8” shallower than GM. Ford 1 1/8” insertion vs GM 1 1/2” insertion. Bolt pattern across. Ford 3 1/8” CL GM 3 3/8” CL.
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