You need a cv flange type yoke for the rear of the dana 300 to connect a CV driveshaft
you have 2 options buy a new cv style flange for the rear output of your dana 300, about $40
or find the front ouput cv style yoke from a 26 spline np231, and put it on the rear of your dana 300
pm Andy from the Carolina Rockshop he said he had plenty of used 231 flanges
I am getting one from him soon
