In addition, here are more codes for the 65;
33=Tempest
35=Tempest Custom
37=Tempest Le Mans
Check the Accessories Code on the data plate, it should look something like this
ACC. X 2P 3K 4F 5N
5 groups make up the codes for example:
(1st Group) X = power windows, etc.
(2nd Group) P = radio (1964-1965), etc.
(3rd Group) K = dome reading lamps (1964-1965), etc.
(4th Group) F = remote mirror, etc.
(5th Group) N = GTO option (1964-1965 only).
Verify there is an "N" after the 5.
The 389 engine casting number for 65 and 66 is 9778789,
The 65 389 engine letter codes are;
Letter Code CID HP Trans
WS 389 360 Man
WT 389 335 Man
YR 389 360 Auto
YS 389 335 Auto
It is my understanding that in 65 the Lemans was a branch of the Tempest, however some say since the Lemans had a series number of 37 that it was not part of the Tempest line.
Hope this helps,