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

