Josrulz, I have a 1977 Sabre 34 MkI with the following upgraded electrical equipment installed by the PO that work extremely well:
Alternator - AmpTech S125e
Battery Charger - Truecharge 20
Inverter - Xantrex 700 watt
Smart Regulator - Balmar MC 612
Monitor - Link 10
Batteries - (1) Engine AGM
(2) House Series 27
The boat is in Rock Hall, MD and you're welcome to contact me if you'd like to know more mgmhead at msn dot com.
Rhythm is an amazing boat and I love to show her off.
Thank you so much for the offer! We'd love to see the install, as I think it will be most helpful to see how other S34s are set up. I'll send you a PM....