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Re: 1972 C20 build and adventure thread
Have you looked into Helmholtz chambers or J pipes? GM used them on 68 GTO Ram Air II cars. Lots of information on the web about them.
https://www.eng-tips.com/viewthread.cfm?qid=427233
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. 
RIP Bob Parks.
1967 Burban the WMB,1991 S(stink)-10 Blazer,1969 GTO, 1970 Javelin, 1952 F2 Ford 4X4, 29 Model A, 72 Firebird. 85 Alfa Romeo
If it breaks I didn't want it in the first place
The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377
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