Thanks, guys! I'm definately going to get the pulleys now. I eventually plan on getting a 130 amp alternator in the future and i think that charging may be an issue because of the relocated battery (lots of resistance in that 15 feet of 4 gauge wire), so if it is, i'll just buy a new alternator or take the pulleys back off temporarily. If not, then i'm set and will be happy

I've heard that pulleys are a realistic 10 horsepower gain and the pulleys i want are like $90 for the 3 pulleys and they're a cool looking zinc (lightweight)!
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Mustang Parts Specialties ripped me off, it could happen to you as well.
'84 Mustang 5.0 LX
my LX
'89 Mustang GT
my GT