24R
I had exactly the same problem when I frst flew the PA32.
The solution for me was a few flights with a smart instructor who built my confidence in handling 'the beast' and showed me that it would land just fine if you nailed the approach speed and got the tirm right - remember that you have a bigger, heavier, engine up front and need to pull back pretty hard during the flare.
I ended up being able to land the Cherokee 6 in little further distance than the Cherokee 180 - funnily enough, I had the same experience when converting to the Arrow 4, with the T tail .... it justs takes some good instruction and a bit of practice, so don't worry.