Manual trans would be cool, for a while. Let me tell you about my experience. I've swapped a 7004r into my old GP. It was a freaking hassle. Some of the problems were, shift points, which we could never seem to get just right. Speedo calibraiton was whacked despite trying several drive gears, and then there was the shifter. Even with a kit, it was never as good as original. I don't mean to be a ney sayer, but I'd simply advise you invest the money in beefing up the existing automatic, and use the gear shift to play when you want to. I'll never do anything like I did with that swap again. I'm not saying it can't be done. Just thinking its not worth it. The only thing it gave me was a higher top-end, and awesome highway mileage. I never thought a 455 would see 22 mpg - towing a bass boat.
2000 SSEi; Silver, Grey interior
K&N filter, removed MAF Screen, TOG Headers, 3.4 Pulley, MSD Coils, Taylor wires, 180 Thermo, Pirelli P-Zero M&* tires, J.A.T.O. Booster in trunk