Truck is 1954 as Stated in a few Places - I - should have Added that again .
1979 Gm Block SUV with 1972 ish Heads .. so Yes that Era ..
Here's a Pic of the Only Vent the Engine has I Just Pulled it Off to Test
but , Started Pouring Rain .
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As You all able to see 4 small Holes and a Mountain of SS Wool . .Brillo
I looked into Punching a Hole in Current Valve Cover and Adding one of those Adapters .. then go through the Base of Carburetor's Spacer ..
I have Elected to Go with slightly Better Covers - which will have Built in PVC - Unit and Filter - Rebuild able for Cleaning , with Breather on other Cover to Balance Air ..
What I was Hoping to Hear : Technical Input on Amount of Required Air Moment - Cubic Liters or Amount Hg -
Vacuum for Idle and Cruise .. . for a 355 Cu. In.