@Oney- That color fits that truck perfectly regardless of authenticity. Looks great.
I'm doing a red 78-79 Ford body for my buddy's trx4. I started on the inside of the body- silver/ rust/ silver/ rust/ silver/ black ( for backer and window trim/ seals). I added the light rust to make the "metal" panels appear more weathered ( to more realistically represent scratches and trail damage when that begins to happen on the outside of the body). Next I'm going to hit the inside windows with tint to finish that off. We'll also tape off an interior portion and hit that with red to keep it factory correct. Outside we're going to start with a light rust coat then gray primer, then the red body color. Fine steel-wool and sandpaper are being used between some of the paint stages ( as well as on the lexan itself). At some point we'll be doing some dust pigments as well as external 2 stage rust spots. Also planning towards the end, to lay down some matte clear.
Final result we're after, will be a weathered faded red body, that when it gets scratched up will reveal primer, a little rust, and weathered sheet-metal.
Again yours looks very good... not overdone which is sometimes difficult to achieve.