I have a 1957 Thunderbird distributor for my 55 (converted to 12 volts, otherwise stock).  I know I have to upgrade the carb to have the proper vacuum advance.   Are there any benefits from using a more modern carb or should I just modify my Teapot?  At this point I'm pretty familiar with Teapots

For a stock engine is the Mummert manifold a better choice?   If I use a 57 type manifold do I need a new air cleaner and/or carb linkage?