The unsupported clip (by the final O in VOLVO) can rattle irritatingly on the cam cover, which also over time wears a mark across the lettering. Cut a 3" length of rubber tube, slit it lengthways, and slide on the underside.
I have seen kits that have no.3 lead angled slightly at the plug end. This gives a much better line of clearance between the brake cylinder and the engine lifting eye.
Tip for replacing the leads: do them one at a time!
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