Thanks Gentlemen, my 66 was built in September 65 and does have other 65 components on the car I have notice ie: engine mounts. Could it be that as it was built in Sept 65 is the reason it is mounted under the dash or not?
Here are some other examples from which should help up with an answer or at least some help
6R10255x Projected build date - 30H
6R1017xx Projected build date - 27H
6R1137xx Projected build date - 30J
6R08A1174xx Projected build date - 07K
6R1222xx Projected build date - 21K
6R1271xx Projected build date - 03L Apparently remounted