choosing the right distributer??

im building a hot 318..10.5/1 i have a 904 im going to keep...

the good guys is coming to my area this weekend and i want to pick up a distrbiuter...what should i go with this is my first motor build...i hear i need a mechanical advance since im useing an automatic not running power brakes...what should i be looking for??or better yet what the best bang for my buck..

also im a little confused on what ignition to use..msd box 6a or what else..im a bit lost in this department...thanks fabo