Just want to make sure everything on my hemi motor is correct. Im learning them slowly. Are all tubes and wires the same except for the #7 cylinder? 7 appears to have a black non-flexible wire that goes into the tube and the tube has a short collar where the rubber spark plug wire seal covers it compared to the others. The others are taller. ?????

The shorter lip tubes are earlier and the taller lip ones are later. I think 1967 was the last year Mopar used the shorter lip tubes. They go on all 8 holes, not just #7.

So I have 7 of 8 tubes that are correct. The short one needs replaced..... Thank u