Exhaust Heat Control Thermostat

[clifftt]

I'm looking for the bimetal spring that goes on the bottom of the right side exhaust manifold which opens the flapper inside the manifold. 1966 Barracuda 273. Mine's broken. Anyone got ideas?

 

[kt340sport]

That would be a Heat Riser Valve.

 

[BillGrissom]

I bought a box of assorted springs at Harbor Freight that I would go to first. Ace Hardware has an assortment of springs and some specialized parts like car fasterners and electric motor brushes.