what should i do?

My 225 is getting 198 rods, 2.2 pistons, bigger valves, cam, some port work, shave the head, (hoping for around 9 to 9 1/2 compression) a Clifford 4 barrel manifold, a 390cfm 4 barrel carb, headers, duals with "X" pipe to mufflers out the rear!

what mufflers should I use?
and what about droning?
maybe headers into pipe then a glass pack then an X pipe then mufflers out the back???

and is 2 1/2 inch exhaust to big with this combo?