Torsion bars

I took all the cast iron off of my 383 and put it on a scale I ended up with a savings of 125 lbs off the 383 with aluminum replacements. I am running a set of 340 bars, and the car rides like a dream and handles well for what i am doing. My duster is 3100 lbs with a full tank of gas and a big block, and full factory interior. Without me in it.