Clutch replacement

I recently had my engine go in my truck. I replaced the engine with one from a Chevy cobalt. Question is my clutch is going and I need a new clutch kit. Do I get a Vue clutch kit? Or cobalt? Are they compatible?

Transmission problem
2002 Saturn Vue 4 cyl Front Wheel Drive Manual

On way to work got on interstate through all 5 gears just fine. Got off at exit and little to no clutch pedal. Started car in 2nd and eased into 3rd and limped to work parking. After work, no puddle in parking area. No puddle in driveway. Is there a way to tell if this is a master cylinder problem? Or a slave cylinder problem? Should I attempt to fix myself or take to garage? I am good mechanically.

Is there fluid inside the rubber on the slave cylinder?

Cant see or feel any

Try to gravity bleed by just opening bleeder on slave cylinder and letting the fluid run out keep the clutch master cylinder full. If you get a clutch back I would suspect a master cylinder. Look under the dash at where the master comes inside see if you see fluid there.

Replaced master, had nice pedal. Waited for linkage parts 2 days, and checked pedal which was fine, and when had linkage in place had pedal on first pump but nothing after. Waited 30 mins, and had pedal on first pump but nothing after. Is it the slave?

The other night the clutch stopped functioning - it was no longer giving any resistance when applying my foot to the pedal - and I could not put my car in gear. Today my husband bled the clutch line, pulled and replaced the master clutch cylinder, pulled the pressure for the fluid replacement - still no clutch. It is still very loose when placing my foot on it. The reservoir for the clutch fluid was full when we opened everything up. Suggestions?