Agreed with all but your last paragraph. If you can, try to get a copy of the Larry Atherton book. It explains both recommended modification and explains the velocity issue. The book goes into detail about the crossover tube and the"proper" way to install it. It is designed to slow the oil when using wet lifters only.
The designer of that crossover was Bob Mullen, a highly respected member of the society of automotive engineers, and the inventer of the W2 head. The crossover method was designed to slow velocity
While still have all the lifter oil leaks. Those leaks are what causes the issue. The Chrysler method is to cut the leaks with a system that resembles Gregcons sketch. Both methods are designed to fix the same problem. One with the leaks, one without.
It is Sanborns method of front oiling that is unique. Even his method uses wet lifters but highly restricted.
The book claims that the crossover method was tested reliable to 10,000 rpm and was used in Bob Gliddens pro stock car. The drawback to the crossover is it is difficult to implement correctly.
