I'm a bit surprised at the entry angle and location, since it looks like it goes very close to the guide boss.
I wonder if he did this simply to avoid making a curve to accommodate the down-draft Rochesters, or was this because of some structure inside the casting (water, support boss, ?) that we can't see?
The original Rajo conversion had a much less severe angle, and entered above the original ports, but left the valve cover sealing surface untouched.
