Before I can give a recommendation, I would have to see some more details.
Get all of the numbers together. Consider fuel, insurance, monthly payments, maintenance, etc. Also consider estimated car value in the future.
Put them on a piece of paper (or a spread sheet is even better) and have a look at the big picture.
You may find it with in your best interest to take the V6, put the money you would have spent on the GT and bank it. Then after 2 or 3 years, you could sell the V6 and take the money that you have saved and buy a new GT (presumably a 2003 or 2004 model). But you'll have to live with a V6 for that time. It's going to take more details though...
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1995 Mustang GT