"Plain Jane" 1970 Nova Build

[big gear head]

I've got those "Made For You" spark plug wire looms on my 427. The valve covers always leaked because I couldn't tighten the bolts enough because of the plastic posts. I made new ones from aluminum and no more leaks.

[Arrowsmith]

Originally Posted by big gear head

I've got those "Made For You" spark plug wire looms on my 427. The valve covers always leaked because I couldn't tighten the bolts enough because of the plastic posts. I made new ones from aluminum and no more leaks.

Very nice job of machining! Mine don’t seem to leak though. Could be a difference in valve covers, valve cover rails on the heads, and/or gaskets. The Brodix heads I use have a taller rail. I use Mahle or Fel Pro vc gaskets (I don’t have a preference) and glue them to the valve cover.