Most everybody uses a 7.1"/.990 pin rod for that. Hopefully your crank is 2.20 pins. Make sure of the width. It's easier to find rods if your crank pins are Chevy width. Compression height doesn't tell you everything on a Hemi because of the dome. Just call Ray Barton and tell him what you have and he will get you pistons. I have a beautiful set in my shop. I can get you the number if you need it.