I tend to remove the stainless injection tube, put them in a bag saved for future use as needed, & install a suitable mechanical "plug" (i.e. Nail, Screw, Clevis, Machined plug) UNDER the Nut of the Smog distribution Pipe manifold or "Tree". I see no reason to leave the injection tube flapping in the breeze of the exhaust gases path.
I do not like the PaceCar jeff method since it potentially damages the manifolds (Tube) female tapered seat.
Good topic with Lots of great ideas and a variety of methods.
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69 Los Z11
68 SS/RS 396/325
68 Los Z28
Last edited by 169indy; 02-23-2023 at 01:49 AM.
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