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[GMCnet] Size of heat ducts in GM interior inits [message #336894] Mon, 10 September 2018 10:53
BobDunahugh is currently offline  BobDunahugh   United States
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Registered: October 2010
Location: Cedar Rapids, IA
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Senior Member
The ducts in this 73 seem to be 3-1/2". Not the normal 3, or 4". 3-1/2 don't exist that I know of. Bob Dunahugh
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