I agree with Jerry's way.
Don't seal the valve cover after a rebuild until it is running right and all the valves are adjusted.
Then you can do a for certain distributor placement.
Then fine time it, after it's running.

Don

1967 GMC 9500 Fire Ladder Truck
"The Flag Pole"
In the Stovebolt Gallery
1946 2-Ton grain truck
1946 3/4-ton pickup,
1953 1-ton pickup
1957 1-ton flatbed dually,
1954 Pontiac Straight Eight
Of all the things I've lost in my life, I miss my mind the most!