I'm planning to buy a power disc brake conversion kit the 64 Impala I just purchased but there's a lot of choices out there for a basic kit that all sound the same. There's everything from Eckler's $539.99 kit to Year One's $788 kit. The catalogs (I have 7 Impala catalogs) aren't very descriptive. Any feedback on good/bad experiences knowledge? Several, but not all, say that stock wheels won't work. That might be my excuse to buy 15" Crager SS wheels. Looking forward to comments. Thanks!