need upgrade help

hello all. i'm thinkin' about swappin' my '91 crx's stock D-whatever block for a 1st gen. b16. there's a great site regarding the swap in the crx forum. look for racing rice. now to the point of this string. what are some of the basic, and some of the more complex upgrades i can make to my crx that would increase it's performance capabilities? (exhaust system, headers, intake, turbos, etc.) any advice will be greatly appreciated.