[ryanroo]

there are a number of places that make block off or delete plates for the oil cooler ports. i think the GM number is 12577903

i dont know the secrets to the stand alone LSX stuff. if you want to use the OEM guage, you will just need to adapt a port into the oil galley for the OE spaghetti line that feeds the guage. if you are swapping to electronic guages, it will probably depend on if they interface with the computer or not. i am assuming the computer needs to see oil pressure to keep the fuel pump relay triggered, but that would depend on how you wired the fuel pump business too.