b18 block hydrolock /fix itr parts

i was wondering if i can replace my pistons and rods with itr pistons and rods… idk i was thinkin bout jus pullin a block from the junkyard n not even worrying bout changing it out. i heard u can only replace them with itr pistons and rods if u replace the crankshaft with a itr also im jus tryin to get everything about this straight…

if anyone can help would be most appreciated and as detailed as possilble would be most helpful cuz i jus got done replace the head , valves and springs so anything would help thanx.

This should answer your questions
http://www.c-speedracing.com/howto/compcalc/compcalc.php
have fun