Here is a couple of pics. The yoke has about 5" of spline with 3.25" of it engaged on the output shaft and 1.75" hanging off the end of the output shaft with the car at rest with weight on its tires. Do you guys think maybe the shaft is too short? Just to clearify this is a stock low compression 440 short block with a set of 906 heads and Comp magnum 292H cam, 2800rpm convertor and a stock tranny. Thanks again for all your help.