[cobrashoch]

None that I'm aware of, but that don't mean they are not out there. As a 385 enthusast, I'd say we couldn't get past the two valve hemi "shot-gun" heads for high power. There was a four valve Cleveland head a few years back that didn't run as well as two valve stock type production heads. And that's the problem with all four valve setups, they scrub off too much power with valvetrain loses, unless you go to a overhead cam design.
And boy would that be a expensive and bad trip to go on.
cobrashock