'67-'79 --although some of the later Dentside F500-up clusters do have the printed circuit board and connection like is found on the '70-'72 F100 - F350 trucks. All other F500-up clusters will have the hard wire connection like the '67-'69 F100-F350.
Most Bumpside big truck clusters will look like these.
Most Dentside big truck clusters will look like this.
1979 (?) F500-up cluster with a printed circuit board.
The gauge facings say 1970 on up. 69 & earlier were different (thinner needles & lettering) When I started driving trucks in 1978 we had some of these. The LN series used the same facings (different panel arrangement) such as pictured. The C series tilt cab also went to the same. 1969 & earlier were still using the 1957-60 pickup facings. A lot of memories driving these old trucks.