no, complete internal vr4, except pistons only evo.
explanation for jo1 n jinkl's statement
if u notice, vr4 conrod is thicker than evo conrod. so obviously at the piston pin, vr4 has bigger area compared to evo. so u have to machine the evo pistons(rebore at piston pin hole), in order for them to be fitted to vr4 conrod.
vr4 conrod better than evo conrod, but evo pistons better than vr4 pistons. so combine them in a vr4 block. better do it during overhaul only, as it is a tedious job. if ur block is healthy, not necessary. so many people in malaysia have cracked the 400whp barrier using 100% stock (but healthy) engine block...