Fatman Spindles for A-Body

[Impala67]

After reading different posts regading these spindles I'm not quite sure if bumpsteer is going to be worse or better than what the stock spindles do. A few posts make me believe they are not the best set up for a 67 Chevelle. I've already purchased them but haven't installed them. Any personal experiences or pro's and con's would be appreciated, Thanks!!