Building W2 heads -need help

I'm using the econo, long valve version. The seat runout should be checked. Mine was good. Other than that, no maching was required. The iron rockers are nolonger available. I had to opt for the more expensive Harland S's. Rocker choices aren't great. Erson also makes rockers. Pushrods should be custom cut to fit to get the optimum lengths (two different lengths).