The only difference between the LS and Crv block, like stated above is the size of the cylinder. LS=81 MM CRV=84MM That bigger displacement is what gives ya more torque. Swapping the crank wouldn't do anything for ya. I recommend you go and find a VTEC head and use that. Trust me, it's well worth it. Even if you were to use the stock CRV block with a VTEC head, you would be running 13's easy with a B16 tranny. Your car is so light, it would snap your neck if you went with a CRVTEC conversion. I just built one with all the internals, ported head and chipped ecu, Stage 2 (My specs, of course) Cams, b16 tranny. It ran a 12 flat on slicks, untuned. My buddy is just waiting for his Hondata and his conversion to OBD 1 harness. Then we should see even better HP and Tq. figures. This is street car, driven everyday, not a track car. Keep an eye out for him, it's a Lightning Silver-colored 88 REX. I'm moving back to H town in about 6 months and for now, he represents my crew overthere. Hope I helped a bit. Peace.