A Challenger front end wo engine/Fenders/grill/bumper is light enough I was able to pick it up by myself. So an assembled front end cant be but 200-300 pounds more.....

There's no need to raise the rear IMHO.

Take care,
Rick
68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451