I agree with the B-man and Twisted 6, I think the weights are pretty close.
In 63' the SS became an option on the Chevy II Nova 400 and it was pretty much just for looks: bucket seats, updated intruments, real nice steering wheel ect..
The 64' the SS still came with the 230 unless it was ordered with the L32(195hp)option or the L77(220hp) both of those options used the V-8 and the
big 4 row rad so they probably did wiegh more.
I drive a 64'hard top (non SS) ) and I don't see any extra reinforcement underneath.I have always heard that the models with posts had the stiffer body's and were better for all out drag-racing.
