I had a heat riser valve stick shut on my Charger, and in the process of
trying to free it up the valve shoaft broke off at one end. Since driving
in cold temps was not a real issue, I plugged the shaft holes in the
manfilod with a bolt, I recall I found a brass bolt and nut 1/4 diameter by
about 3 - 3 1/2 inches or so in length and used a couple washers to help
seal the holes. Its not the perfect solution but the brass doesnt rust
away like an iron bolt, I can remove it easily should I ever really want to
fix the thing and it very effectively sealed the problem/
Mikey
62 Crown Coupe