I have some w5 heads I’ve got as far as I’m comfortable going on the port work, and no holes yet. My machinist said let’s sonic test them.
I have some w2 heads that are done on another engine, I’ve not flow tested but are pretty maxed under the valve, with 2.08 intakes. Paccalloy springs, ti retainers, Strip dominator intake, and a M1 for the w5 heads.