I knew it was ominous when my '60 BN7 ran faultlessly for several months. Then, while driving around the community with a friend, my clutch ceased taking a bite on the flywheel and we coasted down the street to a friend's house. After some car jabber, I tried the clutch again and it was engaging. My friends followed me home without incident and I had no more clutch issues for several hundred miles. This car was restored circa 2000 or so in North Carolina and had a Smitty Toyota conversion installed. I had put a rebuild kit in the clutch master three years ago and bled the clutch slave at that time as well. I know I should have installed an inexpensive new master cylinder, period. Last week I was cruising, accelerated from a traffic signal and lost the clutch, i.e., accelerating the engine produced no forward motion. I don't remember how the clutch pedal felt at the time, but I got the car off the road, checked the reservoir (full) and called AAA. With the car safely in the garage, I found the clutch pedal would compress only a little bit with heavy foot pressure. That had not occurred on the earlier clutch disappearance. I don't think there is anything wrong with the clutch. With the exceptions noted here, it has been good and is almost surely has few miles on it. Since the clutch is not engaging, being somehow held out of engagement, I think either the master cylinder is seized or ditto the clutch slave. My first impulse is to pull the clutch master cylinder, check its function, and install a new one regardless of its condition because it has been rebuilt once. Hoping that is the problem. Less appealing is tearing into the car (passenger seat out, tranny cover ditto, etc.) to reach, check and possibly replace the slave cylinder. Other than bleeding it once, I haven't had any issue with it. My conjecture is that the hydraulic system is locked, either the master or slave cylinder, holding the clutch out of engagement. I don't have a lift and would prefer not to have to put the car on jack stands to try to examine the slave and the position of the clutch fork hoping that the more easily addressed master cylinder is the culprit. Opinions?