My 1964 Dodge custom 880 | Update #13 Indexing sparkplugs

So as it may seem tedious and the power gain is very minimal upon indexing your spark plugs. it certainly doesn't hurt to do this extra thing to make your engine run more efficient, because it's the little things that make the big difference.

[johnmilnerQQ]

On a Chevy 350, all 8 threads are not identical. I would not stack washers cause your spark will be further away. You should shorten up this video too.