1969 Dart GT 340 EFI E85 Turbo Build

i will start a build thread this fall when i get some time to actually work on it. i have a few questions about the fast efi, i wanted to run it but talked my self into a blow thru carb, what are your thoughts on the matter. my original plan was to run the hemi 6 box and the xfi 2.0 through a tb. then i got scared