taking the EASY route, get the entire long block you will need the cobra/mach1 harness (or cut up your old one) intake, and headers/manifolds. all the accessories will bolt up the same, except possibly the alternator, may need the mach bracket for that.. unsure there. unless you are getting a good deal, get a cobra block and add on your own top end items to make it better for not much extra cost.
Thanks for the replies guys. My plan is to get the long block or a complete motor if possible. I knew I would have to replace the manifolds and I figured the harness as well. Thanks again.