# 6 spark plug access hole Big Block
I have a RB in mine and cannot get to #4 and 6 plugs without wrenching them from the top or bottom. I have the schumacher headers. I will be drilling holes for them when I take the engine out this winter. Hey just FYI there are plugs in all different sixes for electrical caps for junction boxes. What I will use to pug the holes. Lowes and HD have them.