440 cylinder heads

as previously mentioned,chime in the "experts"...............

No, not at all. I just wanna make sure they get information, not misinformation. So lets see, even takin EL5DEMON340's best case scenario of a 1.2 point increase, IF we blueprinted at 7.6.....I've seen as low as 7.2, but if we're at 7.6 plus that 1.2 we only get 8.8. That's a far cry from your "expert" 9.5 or 9.7. Have you ever blueprinted compression on a 400? I'm gonna say no.