Thanks, but what to make of the three freeze plugs on the Tiger’s 260 block? I think the normal 260 had only two, which is probably what drove the urban legend, since the 289 had three. People used to think Ford used 289 blocks bored to 260 for the Tiger because 260s had already been replaced by the 289 and, it was said, the Tiger had to have a 260 in accordance to an agreement with Shelby to not provide engines that would let the Tiger compete directly against the AC Cobra. Was this a bunch of hooey? Any idea why there were three freeze plugs on the Tiger’s engine block? Cheers.