I've always used under the manifold wires from NAPA on my 283s, with the original holder clips, and they fit fine, as well as on the 350 I did for a buddy, neat and clean .... the only time I tried over the cover wires it was a pain to keep them from contacting the manifolds

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics