engine swapping questions

[bmxmon]

im planning on changing out my distributor, carberator, intake manifold, alternator, and putting on headers. Im thinking that this should get rid of my problems. Im planning on going with edelbrock intake and carb, accel distributor, and some tight tuck headers. So i need a new bellhousing?? It looks like i wouldnt, but im sure it could be different, i didnt really look that hard. I live in minnesota, so i shouldnt have a problem with the california emissions stuff. My car doesnt have any accessories, and the only things i plan on running off the belt is the alternator and water pump/fan. What is a good radiator for me, for a good price?? That is the thing i am worried about most right now. Thanks for the help.