@RussellSullivan Do NOT polish the heads intake runners. Chamber? Yes! Good.
If you can port yourself (I’ll assume so) or have it done for you, great. That’ll free up some power!
I’ve stopped polishing the chambers. I use a stone with WD-40 if I’m doing aluminum and I’m very close to testing a burr finish in the chambers. Or at least certain parts of the chambers anyway.
