Clay, you are correct, and I have had to remove thousands of them with a pocket knife installed from kits decades ago. In not one single instance did any of those foam pads seal up the bottom plugs for very long.
Just about as bad is dabbing JB Weld over them, it gets soft and peels right off with a little help from my knife. Even when it looks like the JB Weld has stuck well, it fails an air pressure leak test 100 percent of the time....FWIW....Cliff
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https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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