Rob and I spoke today regarding the shorter Alfa slave cylinder. In spite of it being shorter, it appears to be working for him once he gets his bleed issue resolved. That said, I did more research on the web and it turns out, best I can tell and confirmed by Rob's measurements of a leaking unit, that the Pantera used a longer slave cylinder than the normal Alfa 105/115 (which is readily available). This longer cylinder was fitted to the Alfa Montreal (70 - 74 with an original ATE part number of 03.2525-1901.3 with is no longer being made by ATE. The longer cylinder has the following dimensions:
Overall length 94mm - 3.7”
Bore depth 76mm - 2.99”
Bore diameter 25.4mm - 1.0”
The cylinder is being made in aluminum as a reproduction part at the following: https://classicalfa.com/mn014-...utch-slave-cylinder/. Sourced from the UK.
Alternatively Mr. Fiat has it in the US: https://mrfiat.com/italian/alf...-slave-cylinder.html. I suspect Mr. Fiat buys them from the UK source and marks them up.
Also, I looked online and Larry Stock shows that he carries a stainless long throw cylinder. That said, his web site page has not been updated in years so who knows. You might call him: https://www.panteraparts.com/techTips.php
Hope it helps.