Originally Posted by hammertime
406 AFR 227's are not enough head to make a bigger inch small block work @ its peak. I've been this route.
I have a 427 SBC 13.7:1 with a big 8000+rpm roller and AFR 227 heads...The engine has been 9.6-9.8 @ 139 @ 3400lbs, I think AFR 227 heads are enough head for a big SBC.
Just my 2.5 cents