The HP manifolds , especially the passenger side so close to the valve cover will cause the paint to burn

400-500 is fine at idle - 800-900 under normal operating


If your concerned about a lean carb condition , pull your spark plugs and look at color there

If you want to keep your factory valve covers looking pretty , try a high heat paint or install these on your exhaust manifolds
Made to protect the valve cover gaskets from heat


https://www.summitracing.com/parts/fel-ms90425/overview/make/dodge


1971 Dodge Charger Superbee
2011 Ram Sport 1500 Quad Cab Deep Water Blue Loaded
Siberian Huskies