Oh yes! I never had to grind the pushrod holes on my 59 degree stuff. But I used J heads, and then these W2's last. A friend of mine had a twin 434 to mine but with a cammando head on it, it needed some clearancing. Those Cammandos were pretty bad. They flowed terrible, nothing seemed to be machined well on them, and they weren't that cheap once the issues were fixed.