Large valved 273

I read a lot about 273's and the guys who build them. The small block heads available have decent power potential, but the 2.02 intake valve (or larger?) is apparently an issue with the 273's...unless you notch the bore. This would seemingly be exasperated by the lift of the intake lobe.

Now here are my 2 questions in regards to this...

1. Is there any downfall to notching the bores?
2. Is this a die grinder notch or is it done using a vertical mill, etc?

Unless there is some huge drawback, and it doesn't seem that complicated, why is this always pointed out like a hard roadblock?

Seems like to me, other than being cubic inch deficient, it's a good engine with some potential.

It also seems to me that the answer to making one go fast is putting a supercharger on it. Now you effectively increase the cubic inch and overcome the anemic factory head design.

thoughts?