Try a gauge to make sure your temps are ok anyways. Last thing you would want is for your engine to fail and this could have been prevented.

My gauge used to stay in the nutural area and never move from there when warm. But on my log's they were climing as high as 230-240 while in boost. Turned out to be a hairline crack in all 4 sleeves. If this would have gone unnoticed from relying on a old OEM cluster I could have caused serious damage.

Good Luck, if anything you will have a gauge that works right