I don't mean to clog up this thread, long day and not enought sleep. Complete thoughts aren't cumulating at full speed, haha. Another question, before it slips my mind, was whether you had decided on your manifold yet? I think the DCOEs get up to 55mm.... I could be wrong. The K20 can get some pretty wicked flow compared to what these old L heads will do worked over. Where do you stand on that side of things thus far?