SO WHY WOULD THE VALVES BE HELD OPEN ? nothing changed . maybe the .010" lower added to the push rod length and you need to shim the shafts to get the preload back ?? maybe a lifter variance ? that's about it . .something had to get longer to hold them open .
That's why I posted here. I've worked on my own Mopars for close to 40 years and not seen this before and was hoping some here had. I've rebuilt at least 6 440's as well as several small blocks and several different Chevy and Ford engines. I always have made sure the timing marks are correct as it is so hard to go back and check once it is installed.
