When I put my 440 back together I read everything possible and planned and planned each step to assure success. After putting my cam in and bolting the timing chain on I was 99.9% confident I had done it right. However, I found out I had done it wrong by using my degree wheel and looking at the timing of events. They were way off from those listed on the cam card. After much head scratching I found my stupid mistake...I misaligned the crank dot (used a dot pointing out the keyway to use rather than the dot to be placed at the 12 o'clock position). Stupid stupid mistake on my part and absolutely would of been missed if I had just aligned the dots and bolted things up.
