The horse is dead

WTF? The OP already said he wasn’t going to modify the heads.

And there is nothing wrong with the rockers so what’s to modify on those?

Damn. Get over it. You aren’t qualified to build an engine. It’s ok.
Your comments are very tiresome. There's nothing to back them up. You do it to irritate people and be the one that has to be right. To also make others feel less than you. Sounds like trauma. What a miserable existence.