what the guys said plus :
stay away from I6 engine (rb2x) and 2JZ's they wight a ton and cost $$ to swap..do sr20det swap it's some what lighter than the KA and give you a 8000 rpm rev limiter...or a KA..you can find'em for 70$ anywhere from kids swaping an SR into there cars.
VG30ET is not recommended b/c it's a shitty engine and no aft. market support for it.
