I am going from the shaft radio to a DIN1.5 Delco radio since my wagon was a factory radio delete car and was dealer aftermarket radio installed when new. Radio was junk so I scrapped it. I wanted factory look and I like the delco 1.5 DIN stuff.
Word of warning, the steel bracket the dash is molded to that the bezel snaps into and the din 1.5 radio bolts to is different. Of the roughly 6 snap clip points 2 or 3 aren't common between the two. Either need to cut new slots or cut the tabs off the bezel and risk the bezel wiggling around on the bottom. Also likely have to make custom radio to dash brackets from what I have seen.
Unless the stuff falls in your lap or you had a radio delete car and total junk to start with, id keep the shaft radio and swap to a modern replacement that looks factory.
I had a Retro sound in my 69 442 for one day and sent it back, didn't like how the music sounded I am very meticulous when comes to music. That radio reminded me of the Sparkomatics back in the days. You will be happy with a 1.5 Din more options, better sound.