I agree the tie rods are beefier on a Granada than on a 65-66 Mustang. Mine fit the originals if you want to use originals, but I understand wanting to use the Granadas. they only cost a few bucks more than my bushings. However, the bushings were really designed for the applications that CAN NOT use a Granada tie rod end. The bushings will allow you to use the original tie rod on the driver side of power steering equipped 65-66 Mustangs. There is not a replacement Granada tie rod that will fit that application. Mustangs Plus offers a custom tie rod for that ap, but it costs $90.00. A bushing is a good compromise there. Also, the bushings will allow the Granada spindles to fit 6 cylinder cars without changing out the entire steering system to v-8, which gets very expensive. The Granada tie rods will not fit into the adjusting sleeves on 6 cylider cars, so the bushings are a big savings there. Bottom line: Use the Granada tie rods if they will fit, otherwise, a bushing will do the job. They are chromoly steel and precisely machined to fit, so there is no worry of any failure possibilities. And they only cost $20 each.
MustangSteve