1970's 1980's General Motors 26 Spline Automatic Transmission Slip Yoke as shown.  It measures approximately 5 3/8" from the tip that goes into the transmission to the center of the U-joint opening, approximately 3 1/16" from center of U-joint retainer groove to center of U-joint retainer groove, and the opening for the U-joint caps is approximately 1 1/8".  I'm not sure what years and transmissions (Power Glide ? TH200 ? TH350 ?) it fits, but it is stamped GM54 and 7811457  Check the pictures for manufacturer's markings and make sure that it fits your application.  This is an original part that is has been blasted on non machined parts and the rest cleaned up.  The machined parts have very slight pitting/grooves.  What you see is bare metal, which should make prep for painting easier.  This would be a great item to finish off that restoration and plenty of life left in it.  Please see the pictures as they are part of the description.  Again, check to make sure that this will fit your application.  What you see is what you get.  Look the pictures over and judge for yourself!