Carb help * the famous debate and 2x different cars

Ok !! So my 380hp ( 400hp/440 tq ) crate duster's holley is shot ( 650 cfm : 4777 ) d.pumper , and im looking for another one...a 750 cfm dp would be better i think ? , So i bought a 750 cfm edelbrock for my stock 5.9 magnum ( 300hp/400 tq ) that goes in the big 68 fury , should i put a 4160 600 vacuum that i have on a shelf that needs a rebuilt or the newly bought 750 cfm edelbrock ? fury is 3800 pounds / stock 5.9 magnum / and 2.76 for now , soon will be 3.23 ...So , should i put the 650 dp of the duster on my stock 5.9 , the 750 cfm edelbrock , OR the 600 cfm 4160 vaccum ..... EDELBROCK VS HOLLEY , and im a newbie to adjust carbs , my friend was doing the fine tuning ..hes not around anymore

received_573665181128126.jpeg

Screenshot_20240324_175215_eBay.jpg

received_1619973882166413.jpeg