Quote Originally Posted by Oldf100fordman
That's the way we did it on my friend's 67 390 Cougar back in 68. Otherwise it was take the mounts loose time. Big pain in posterior.
Maybe it's me but I've never really had a problem changing plugs? You can't see what your doing and do contort you hands and arms in ways they were not meant to. But never had to as far as drilling holes to get art them. Both with headers or stock manifolds.