Clutch pedal engages high

[WhiteyII]

As the title states ....... last summer I bought a 98 base with 9100 miles on it and since have put on another 6K basically the car was a 20 year old new car. I’ve had manual tranny’s my entire driving history, just saying I’m not a beginner. The clutch pedal engagement is getting higher and higher with NO slippage at all, I have power bled the clutch twice (pedal depressed) with no improvement. I’ve read posts on slave cylinders and master cylinders but can’t find any tests to prove which one or both would be causing my problem. Are there any tests or suggestions you know of? I do all my own work and would prefer not to change parts/money unnecessarily. I absolutely love the car but would love it more if the clutch pedal felt better, the clutch assist spring has been removed. Thanks in advance, Dave