Also realise that you may or may not be able to get this valve to unstick and stay unstuck. After many decades and thermal cycles, sometimes they're just done, especially this early (pre-'71) type. /QUOTE]
Just got it back on the road and the exhaust flapper valve that was feeling so nice and free out of the vinegar bath is sticking at operating temperature. Seams to stick when the shaft is all the way one direction through the exhaust manifold. Haven't found an anti-rattle spring yet, but not hopeful that spring will help the hot sticking. I hate to wire it open while I chase a couple dozen other more important tasks on the car but that may be where I'm headed. Letting it stick when the valve is closed seams like the worse of two evils.
:mad:
