I would look to see if the instruments are NMEA 2000 compliant as well so you can get them to talk to each other.
I have a new ST4000 auto pilot - only NMEA 0183 compliant, and an older Lowrance Chart plotter/ depth guage/log that is NMEA 2000 compliant. Although I can set the Chart plotter to NMEA 0183 the instruments still will not talk. Talking to agents at the moment.
It is easy to fit the instruments, and local agents will help with advice, but it does take time and the need to be able to contort yourself.