Looking for some advice on the Islandia, 2007. Twin 155 v-tech.

I found one for sale, One engine blown and the other at 200hrs.

My main questions,

Can I upgrade these motors, if so what too (straight swap). If not, what the latest year they made the 155hp that I should be looking for.

What other known issues should I be looking for.

Is the drive train, prop etc specific to these boats.

Anything else to know pre purchase.

Any advice will be greatly appreciated.