Correction, it wired closed, I was thinking about it in the wrong direction.. I wired the flap closed while I had the manifold off last fall. The counter weight is missing from my assembly, appears to have been gone for a long while.

~ Craig
1958 Viking 4400
"The Book of Thor"
Read the story in the DITY
1960 Chevrolet C10
"A Family Heirloom"
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'59 Apache 31, 327 V8 (0.030 over), Muncie M20 4 Speed, GM 10 Bolt Rear... long term project (30 years and counting)

If you don't like driving yourTruck, you won't drive yourTruck..| Living life in the SLOW lane