The engine should run pretty cool, 170ish. You should be able to put your hand on the intake manifold or exhaust manifolds without burning your hand.
The boats are wired for standard gauges, Capt Rick has put packages together of replacement analog gauges, you can DIY if you want, there's a sticky in the forum. I'd probably just go with what he's offering.
Gauges and digital displays on these boats sucked since day one, so your boat works flawlessly;)