will newer inner c10 dashboards mount to a 86 fairing

I'm moving this to the C10 board...

By new, are you referring to the 94+ models?  The lower ones will, but the upper one with the dash won't as the gauges are different.

I swapped gauges to newer style and did newer style inner because the pockets are so much better.

Had to change the fairing bracket to post 94 for speedo swap