1966 Hemi cars, B-body station wagons, and possibly B-body 383 cars came with the same 14 x 5.5" wheels. No 14 x 6.0 wheels came on 66 B-body cars. These wheels had 10 holes.

The same wheels were used on 1967 Street Hemi cars (as the standard steel wheel) and were also used on:

67 B-body wagons
67 440 (and Hemi) Chargers
67 GTX's
*And possibly on some other 383 equipped B-body cars

The 67 Wheels were 100% identical to the 66 wheels but only had 6 holes, 5 lug holes and 1 axle pin hole. It is possible that some early 67 cars got the 66 10 hole wheels but I have never seen a proven original that came this way.

After March of 1967 these wheels had stamped in date codes, there were no visible date codes on earlier versions.

.02

*Pics are of a matched set of 67 Hemi wheels dated 3-31 (March 31, 1967). the black wheel is single 67 Hemi wheel (the spare) from a different car spd'd November 1966.