No barrel maker would warrantee a barrel that was modified by cutting lower impact surface.
I agree with AirCooled, Clark Para is the easiest cut to modify the frame. As far as choices go, let's face it it's SVI, Schumann, Barsto, and KKM.
These are the best barrels you can buy anywhere. They all have a C/P choice.
I switched KKM after building on the others because of their quality, price and (importantly) their customer service.
They have always had what I wanted in stock. Their prices are great, and they answer the phone!!
I Ransom Rest my builds after they break in, and KKM groups just as well as the others.
Fitting them is easy once you know that the bull taper is more oversize than expected.