If they are your original wires, they are probably fused to the spark plugs. They may come off, they may pull apart. It’s just a matter of time and heat. If I were you I’d just drop the dime now and get a new set of wires. Honestly, get them before you dig into this. One trick you can try is twisting the spark plug boot (not the wire) before pulling them. Once the boot is lose it should come right off. And before you ask, no, it really doesn’t matter what brand of wires you buy. Just do yourself a big favor and get a set made (cut to length and crimped) for your car.
