Make some basic sheet metal heat shields for your manifolds/headers.
Every single car and truck you could buy started running stamped sheetmetal heat shields several decades ago. They reflect radiant heat coming off the exhaust away from the rest of the compartment & down toward where air is flowing off the K frame and towards the floors. They work.
Before I made & installed mine, I couldn't even touch the underside of my air cleaner after driving the car. I just reuse the bottom left/right corner valve cover bolts to mount mine.
1967 Dodge Coronet Deluxe station wagon
1.03" T-bars, QA1 arms/rods, Cordoba/GM Metric/Volare brake & knuckle, XHDs, Hellwig rear sway, 318 Magnum w/ air gap, 727, 3.23s
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