74 duster
 

i have a stock 225 duster i want to get a 318 witha 727 tran what kind of rear end i am going to need and what else i need to upgrade

upgrade
 

if your duster has a stock 7 1/4 rear, i would at least go to an 8 1/4 - they are cheap and plentiful. 8 1/4 is plenty for a mild 318 727 combo, parts and gears are available.