Hello Hybrid Z, 
I need help building my stroke motor inside my 240z.  I got the ld28 crank, I need advise from some one who has done a similar build.  I am ready to purchase some parts mention below but still want more answer from some one who has experience this build before.  I plan on going with JE piston 88mm, I talked to racetep and they said to do a dish piston.  What are my advantage of a dish piston vs flat.  As far as rod goes I cant seem to find the 9mm rod, so I might go ahead with Cunningham rod.  If going with Cunningham rod what size would be best.  Im also going to use a JWT Z31 conversion.  Any help would really be appreciated.