Welcome to Allpar. Sorry it took so long for me to dig out the book.
I have a Motor manual the lists the A-250 (non-synchro 1st gear) from 1962 to 1974. The fully synchronized A-230 was a relief from crunching 1st gears from 1974-on. The applications may have overlapped in production and the A-230 been an option during the early-'70's overlap.
I don't know when the A-230 ended as the book was a 1977 edition and I remember the base Volare column shift 3-speeds then. It may have been available in the truck applications until the early 1980's?