I added an additional temperature gauge, one with values, a volt meter to compliment the amp meter, and in the center a fuel pressure gauge. I have an electric fuel pump and have realized I need one with more flow.
Another addition are two new 6V Trojan T-105 batteries in series for my auxiliary battery bank (replacing two 12V batteries in parallel, which was a no-no). I switch this bank in with a perko switch to the chassis as needed. I can also connect the generator battery to the chassis if it needs a boost.