"Nope - the only clutch pedal stop is the firewall panel itself."
Sorry Dick, that is not true on other than the early TDs. The later ones (I'm not sure just where they started installing them) have a clutch stop in the pedal box. If you want to e-mail me at SUfuelpumps@donobi.net, I can send you a picture of the stop and somewhere I have some drawings with dimensions for the stop.
Cheers,
Dave
http://homepages.donobi.net/sufuelpumps/