Buddy sign0016 To C10 Trucks First off I can not answer the question about the Apache I know that the dual headlight fenders are different than the single headlight. I'm sure some one will be along with an answer.
I recall, without certainty, that Apache 10 was used in 61 & 62 and had dual headlights. C10 started in 62 and had single headlights, and the C10 trucks were similar to one another 62 through 66. The GMC models continued on with dual headlights.