I picked up a new or (a great job of a rebuild) of a shifter. It looks like ,and was tolded it was a e- body. Now that i got it home i noticed that the shifter rod holes are 1/2" instead of 3/8ths. Now can i get the rods with 1/2" on one end and 3/8th's on the other? Did the factory have both sizes at different years??