Originally Posted by camaro355
find a set of vortec heads they are the best cast iron heads gm has with a valve job and port work and bowls blended these heads are pretty impressive
I see that you're new here and want to help, so I'm gonna try to help you along as well. The L31 Vortec cylinder heads are the best PRODUCTION cast iron heads that GM ever produced. You can't say they are the best cast iron heads that GM ever produced because there are other BowTie cast iron heads that GM has produced that will put the L31 heads to shame. Difference is, they're not PRODUCTION heads.
So, again, here's the way to say it.....
L31 Vortec heads are the best flowing SBC PRODUCTION cast iron heads that GM ever produced.
Hang in there, it gets easier......