^Not quite. I think 2800lbs was the number you were looking for, which is a little less than the stock weight. It's kind of a grey area, because each car adds and subtracts different things with the swap, but the most even comparison as documented on a single car (bone stock FD to very basic LS1 Hinson swap, with AC and PS included) ended up at 22lbs over the starting weight. If you really care, you really ought to (corner) weigh the car to find out where it's at, as conjecture based on some other guy isn't going to get you very far. It's not a bad idea if you already planned on doing an alignment or something else already.

Most swappers end up very close to 2800 lbs, and most swappers don't kick themselves for not buying a Corvette. There's a lot more to the RX7 than Corvette - 300 lbs + triangle motor, and if you think otherwise, then I would advise you to get the Corvette, as I'm sure the differences wouldn't matter as much to you as they would to those who swap their 7s.

OP, I know of at least 5 other red V8 FDs in the Tampa area, and one black one (though I don't know that owner), so you're in good company if you ever want help/advice/parts. Do you have any near or distant future plans for the car yet?