Quickest and easiest way to time a 460.
Roll the thing over until you are sure you are on compression stroke, #1 cylinder. Then use a TDC finder screwed into the spark plug hole, or me, personally, a straight piece of a coat hanger stuck in there. Buy rotating back and forth and I know I'm at TDC on #1, I use a white or silver Sharpie marker and mark the balancer (Which are usually off on their marks). Rotate it over again 2 times, while watching for your mark to start coming up, but this time watching #6 start with the coat hanger in #6 and rotate until RIGHT as the piston starts to go down. Make another mark. This is 10* BTDC. Drop in the dizzy with the rotor pointing at #1 cap post, viola!
Most of the time, you won't even need to ever put a timing light on it........

Ray