Mine's been great since originally built in 2006. It's a KB block. My lash grows about .012" cold to hot.
Chip, what is your oil pressure at idle at start up compared to idle at 180 degrees? I have an aluminum Indy block on my 528 Hemi, it's about 75psi at startup, while cruising its about 35psi at a stop light when warmed up. I have the oil restrictors in the heads.
