I have just completed a rebuild of a 1970 Chevy Caprice.
454.
bored, balanced, new pistons, new cam, new exhaust valves seats and seals, valve springs, headers....
I started the engine for the first time today.
After only a few minutes, the header tube for #3 cylinder started getting cherry red.
The engine runs smoothly and doesn't backfire.
What the heck did I do?????
Please help me.