best way to know for sure would be to call and talk with Frank or Paul at Jersey Jack Service (732-364-9900 x1)

From what i know of the kit, it will be a complete replacement for the entire system. New power supplies, new data/power wiring, new light boards. Since the 7.5 boards replaced the 5v system and the 2.0 boards replaced the 7.5 system, I do not see why a 2.0 kit wouldn't replace a 5v system.

Have you reached out to Frank at JJP? He might have a person in the area that is not on Pinside. Otherwise, Endless pinball is an Authorized JJP Distributor, but he is down in LA. Still, he (Pat) might know someone in your area too.

2.0 boards will (should) be in any game produced after 12/15/16. there is a kit available to update any game.

that being said, my person 75th with a build date of 2015 is been flawless as far as light boards go.

have you been able to make the house spin during gameplay? if not, go into the Full Menu -> Tests -> Device Tests-> Spinning House and run the house test.

correction. It's PinballStar, and I believe that Automated is the only distributor left with 75th-anniversary editions.