One of the members, and my personal friend Alex M. has successfully swapped a 98 (2nd gen motor) into his 93 Altima (5spd). He did alot of engine work and added all boltons. I will post a detailed article and pictures when i get back on Sunday...
Altimas are NOT slow... I'm faster than Integra GS/GS-R's in my SCCA STS car-class. I'm in second place in points, and I'm only trailing a Civic Si (with many many mods) by thousandths of seconds. I'm only running Ground Controls, Rims/Tires, and Stillen FTSB... other than that, I'm all stock with an Automatic to boot!
Maybe you're just not driving it properly.
But I'm still trading up for a 1997/1998 240SX... I'm getting tired of understeer.
Actually, I've moved on from AutoX to Track Days... more money, but you get much more track time... and you get more speed too.
I've offered to take some Dot Net people with me, so they can ride along, but no-one's ever take up my offer except my neighbor's kids. They have a blast, and their parents hate me for getting them hooked on racing and speed.