"Straight tube to filter box just as good"...Wha?
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As I stated before, I believe the vacuum line is directly connected to the filter box. I am not concerned about it going soft and laying on the block, the 3" spectre flex pipe from oreilly auto parts is a tough plastic. And even if that did happen I could always just replace it again for $20.
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Yea mine has that vacuum line just like yours(on the air cleaner box) but my hat on the tb must be a little different than yours it has a vacuum line just like the one he replumbed into the 90. I will try to get a couple pics of my hat and set-up tomorrow so you can see what I am talking about. Thanks for your help so far though.
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On second thought, scratch the 45 angle, taking a second look I see the air cleaner box is closer to the firewall so a 90 like he used would be perfect, and then just take the flex pipe and fit it over the end of the pipe and clamp it down. To avoid the second straight PVC pipe youd need an elbow with a male and a female end, female end to the TB and the male end to the end of the flex pipe. But I also believe you can just get an adapter to mount on the TB that is constructed of PVC and you could drill/tap that to work with the second vacuum line that you have.