Exhaust manifold heater flap

[srfinatsunset]

I’m not sure if the exhaust manifold heater flap is in the closed or open position. I can’t move it when the motor is cold or hot. It stays in the same position when the motor is hot. (like ran for 30 miles on the freeway) The plan if to trash it when I put a new exhaust in but for the mean time it stays. 1969 K10 suburban barn find. Sat for a few years. Now runs like a champ.