My 57 is pretty stock except for lowering it a few inches. But I'd like to have power brakes. The kit says it just bolts in place of the old one. But you need to replace the transmission cross member. However, it looks as if the old one is riveted with great big rivets! I assume I'd have to drill them out. Anyone done this? Suggestions? And also, if you've done this yourself, do you think the power brakes work well or should I consider just replacing the stock master cylinder with a dual master cylinder? Any and all suggestions appreciated!