1990 Ford F150 8 cyl 5 speed - clutch master cylinder on 1990 Ford F-150

Clutch peddle goes all the way to the floor. It will pump up but it does not stay that way. Is it the Clutch master cylinder? Also do you need a special tool to take it of for that year Ford?

Asked by for the 1990 Ford F-150
assume you have checked fluid level. if full, could be master or slave cylinder on transmission bypassing.
Thank you