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You may benefit from some geometry changes to your mechanical linkage, if you can tolerate a bit more pedal travel. I used to modify the old F&S racing PP's and some required considerable pedal effort. Linkage changes added more motion, lessing effort. I did not like the hydraulic conversion only because personally, I imagined they had less feel. They DO feel "different".
You can use any Alfa hydraulic unit that fits easily, or is easy to modify to fit. However, if the Tilton is really heavy, you may need a sturdy slave cylinder mount. You might check with Tilton on this as they would know what slave cylinder is best with your clutch. Then it may be that the Alfa masters cannot provide the volume needed for a Tilton slave, and you will be back to Tilton again for another modification.
Look at the Alfa options, but check with Tilton first.
 

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No, the old Fitchel & Sachs racing clutch was used on racing Alfa TZ's, TI Supers and GTA's, as well as many others. There were several versions, or variations, including a "lightweight" version for TZ's that was usually quickly replaced by the heavier GTA version, as the light one did not hold up well.
These were often used with solid hub discs, also from F & S. These are no longer available new, though there is an Asian copy that is not as good as originals. I've run these for many years, and used to rebuild them for pure race use.
I've a few of these that are not for sale for my own use. I too am almost 20 years older than my 52 year old Ausca spider, and these easily hold the power of my GTA engine without excessive pedal effort.
Early versions had a flat ring welded to the top of the spring covers. Later, about '66, the big ring was thinned a bit, but has a rounded lip, so it is as stiff or stiffer. The light TZ version had a thinner base plate that bolted to the flywheel, and you KNEW it was thinner because bolted up to the flywheel, this plate sometimes was wavy (!!!) with heavy springs installed.
I'll try posting some pictures, but other BB members tell me photo posting was not working earlier today.
If my photos don't work here, (Still NOT working now!) send me a PM with your e-mail address and I'll send them by e-mail.
 

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Yes, totally agree. He probably has the rod rather than cable, but the T.O. itself changes the geometry because the old F&S T.O., even modified has a different 'depth' than the finger type with Centerline adaptor.
I discussed the photo issue, and it's being worked on. At least I can STILL send photo's e-mail!
 

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Again, send me a private message with your e-mail address, and I'll send you photos of what works well, old school, withour breaking the bank or your leg/foot. My GTA engine is considerably more agressive than your engine build, and in 52 years, I've never had a clutch issue.
 
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