Welcome to M&M Kelly.

You should support the car on the existing front and rear subframes. Let the suspension hang loose. Make certain that the car is on a flat surface, then even up 4 jack stands as best as you can.
It is best that you let the car settle for at least 48 hours before you begin the installation.
------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl
Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com