My 68 did not come with a radio or face plate. I did a lot of looking to find something that would fit.
I settled on a "Retrosound metro 4" $400. The add said it would fit right in like new. What they didn't say was, the purchaser has to put the components, brackets, knobs and hookups together, spend multiple in and out of the dash to adjust to fit, and that the directions are very vague. It took me hours with my wife reading directions, going online for better directions, three calls to the company and was a real pain in the A--. I made a face plate out of 1/4 oak made harder by the dash bending in the middle slightly that I didn't notice until installation. As big as the opening without the face plate in, and having to make one myself, I really could have used any radio out there.
On the bright side, it sounds great, has multiple USB ports and other plug in's. Two ways to wire to speakers. I hooked it up to four speakers, a sub-woofer, two tweeters and an amp. It could also be hooked up to a sub-woofer amp but I had to stop somewhere.