which type of cam to use in this engine?? 351w swap

I have a 351w casting number e9ae-6015-aa-14. guy who sold it to me said it was from a 93 bronco. but I searched here and e9 is an 89. 93 would have been a roller cam motor which is really what I wanted. my question is what type of rollers are they? which cam can I use? I was looking at the b303 but will it not work? its a 40k motor so he says and is really clean looking. some help? was also looking at a comp cams thumper cam. I have the pan and headers. its going to be carbed. I'm stuck on this because of the diferent types of lifters on the summitt website like hyd flat tappet and such