Yes indeed @ $20 per aerosol can that green paint is an expensive touch of class. and not being an electrical
expert this answer is based on my experience with an older Volvo Penta.
shop I dealt with expressed the opinion that there were better made alternators out there and threw mine in the garbage. I wish he has saved the pulley. there is a ratio between the diameter of the crank shaft pulley and the one on the alternator. On my 2003 that is 76 MM. but also the Vee profile has to be the same as well because the rev counter measures the electrical pulses from the alternator. Theoretically as the Vee belt wears thin the accuracy changes very slightly. However an out of dimension pulley could change this a noticeable amount.
Better minds than mine might know IF that would also affect engine hours readings used to determine oil change
Another consideration is that some systems with several battery
banks have an Isolator which has an amp hour rating, The system I salvaged the engine from had an Isolator rated at 70 Amp. The standard alternator was 55 amp. So IF you fit a higher amp Alternator (they changed to 105 amp/hr Delco) That battery
Isolator may need changing too?. However I have been told that a 70 amp Isolator may survive IF the batteries
remain reasonably charged ?
Valeo Paris Rhone alternator's supplied to Volvo Penta (in my application at least) Have a non standard pulley without a hub.