I'm sorry, i don't have any pics of that WIP, since it's about ten years old and i didn't have a numeric camera at the time..
But i can tell you how i did it, i just took the 1969 R/T grille and bumper, i carefully removed all the grilles and divider to keep only the surrounding(if only the 1968 was released at the time, it would have been easier since it doesn't have the center divider) and i cut the grille from the MPC bumper and trim it to fit on the Revell opening..
Simple as this, it only took a few minutes of work, and i sent it to chrome.
Thank's for the comments..