B303 Cam and Ford Racing Performance Pulleys..Bad Idea?

Just found one answer after checking the search again. Still couldn't find anyone with comments on the b303 and pulleys but one asnwer: Don't put the under-drive alt pulley on. Well, that's one option because it doesn't net any HP anyway. Your accessories won't hurt as a result.
 
I recommend the "F" cam . pulls alot harder up top and sounds great at idle, I also have the pullies on and when running the air at night you can notice a little drop in lights at idle , but no big deal
 
I don't think a cam should affect the accessories much, as long as your idle doesn't go down. Maybe I'm wrong. All I know is with my stock cam and pulleys, I was draining my battery real bad with my stereo. I finally swapped back to my stock alt. pulley. Someday I'll get a better alternator, but all my money is going towards my engine buildup right now.