LTFT or BLM depending on what software/scantool you're using is the long-term memory for fuel. It'* compensation for the base fueling algorithm. STFT or INT is the short term memory for fuel and it is direct compensation based on input from the O2 sensor in closed loop. (operating temp and not WOT)
Ideally, the LTFT should be around 128 and be fairly steady. The STFT should hover around 128 but will change more frequently.
If you're running lean, you're STFTs will first try and compensate and the values will be above 128. Next, your LTFTs will raise above 128 so that your STFTs will hover around 128 again. If you're running rich, it'll be the opposite.
You're running the same PCM (I think) and code I'm currently running. (I'm using the 94-95 L27/L67 code) It faster than your average OBD1 pcm and there are a ton of unlocked parameters you can tune. More than anything you would ever really need.