[steelcomp]

660's were designed for one application...dual four barrel on a tunnel ram manifold for drag racing or marine use. For that, they work great. And you're right about getting them in stock trim. From there, a competant carb shop can do wonders. A guy in his garage reading Hot Rod Mag, on "how to modify your 660 Holley" is most likely going to end up with trouble, figure it out after hours of frustration, and sell them on ebay. The next poor sucker doesn't stand a chance.
You're also correct about milling the choke horns off.