2RZ's (142 hp and 160 ft. lbs. trq) are the little brothers of the 3RZ (150 hp and 177 trq)  @ 2.4 litre's they tend to be cheaper, don't have balance shafts because of a shorter stroke and are 8 hp less.

2RZ's come out of the 2 wheel drives and the 3's from the 4x4's. 

Mounts for both can be purchased to make it a bolt in from the 22r/re if desired but that's neither here nor there

           



I used Chilkats Mount conversion and oil pan setup. Bolted right up and are of great quality. 4 Coil is what I put in. Best thing to do is Read up. There are little things to concider like the differences in the intake manifolds and the way the spark is distributed just to throw a few ideas at you.