It's not like the old days when all you had to do is plug in a new crystal and re-peak a few coils.
Boy! Your old days were sure a lot easier than MY old days! Very few radios that I encountered would tune down to the ham band without modification. GE Progress line is a good example (and, also, one of the most popular radios to modify for ham use in my area. Taking apart that RF preselector transformer and replacing the capacitors was a good half-day job for those with lots of experience; as much as several days for first-timers. Transmitter would usually tune but that receiver evened things out.
Motorola TwinVs and Motracs were iffy. Sometimes yes, sometimes no but there weren't too many hams that would pop for the price of a Motrac in those days. I was lucky. I had the "use" of a brand new UHF Motrac on the weekends but it had to be retuned and ready to go on its commercial frequency on Monday morning (I had the equipment and the license to make that legal). Lots of good sounding radios in those days (unlike the rice boxes today) but they always knew when I had the Motrac on the repeater; the audio quality was distinctive (good).