Wait until you have enough money for better gears. Gears are AWESOME. I just bought an '89 GT with 3.55 gears and no matter how i drive the car it is in the power band all the time. whereas my '84 LX has 3.08 gears and i rarely get out of 3rd gear when racing and i usually have to drop down 1 or 2 gears. It makes acceleration really intense and it doesn't cost all that much, you could probably have someone else install them for a total cost of around $600 plus the gears. Good luck!
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previous name: 84stangLX
'84 Mustang 5.0 LX
my LX
'89 Mustang GT
my GT