Unless I'm mistaken, if it's a B/RB/Hemi you should be able to see the lifters for #1 cylinder through the distributor hole. A/LA/Early Hemi/Poly, I've never had much luck with the finger in the spark plug hole with a fresh motor. Off with the valve cover.

"We live in a time when intelligent people are being silenced so that stupid people won't be offended".