hello all new here,has questions :) lol

hello my name is rick, and just picked up a 72 duster for the wife. im a buick guy and new to the mopar world and looking for info as far as interchange of parts and years. like what years fenders will work, what rear ends will work, are there different bellhousing bolt patterns between big blocks and small blocks. the bolt pattern deal, is there any 15 inch rallyes that will work on this car. k members, can i put a 340/360 on a slant six member? again new to this area any info would be great!! thank in advance rick . ps she really likes the shark tooth grill, will that work on a 72?