Ahh i see. The reason I ask is Iam wanting to put together a turbo b-block for my 65 coronet AWB. And Iam wanting to run a 4 speed. I have heard the 23 spline 833 will take almost as much as a 18 spline. And since most of the hp and torque will come on later in the rpm range it shouldnt experince too much shock off the line. Food for though at least