I have a nice b16 ... built head with FULL ferra valve train! Has 5k on a rebuild.. Was told the bottom end was forged but i am not shure.. I know the guy i bought it from is still on ia and is looked at as a " ALL MOTOR GOD" .... ILL GIVE A NO KNOCK ON STARTUP WARRANTY! lmk...I am about to take pics and post it you got first jump....