Trust me, ALL the motors in the Alero are good for modding
Jackel is running a cammed LA1 and when he gets it tuned, it will be a beast. Alero B888, Kw, and BJ are all running s/c LA1's all 3 cars are very impressive. The LA1 motor, although a different generation, was in the 93 Camaro, mated with a 4L60 tranny. The trannies couldn't hold up
Ion is running a s/c'ed 2.4 twin cam motor, DOHC is building a awesome motor right now. This is a newer version of the 2.3 HO motor that was in the 91 Cutlass 442. The first na 4 bannger to run in the 14's in the 1/4 mile. This is fact, it wasn't a civic, or Evo
The 2.2 Eco motor's bottom end is pretty much bomb proof (bullet proof isn't a strong enough statement) the bottom end is pretty much the same as the Ecotec Cavy and Sunfire were running back in 03/04, they where turnning about 1000 HP.
Use the motor you have, it's better and cheaper than the project you are thinking of