Thanks Jeff for the info on this setup. I will definitely go get the thickness and flatness checked out this week. I was hoping to get this car finished before my next semester in college but I'd rather do it right the first time and not have things go south on me later.

Thanks everyone for the help and all your knowledge. Much appreciated.

Oh, just out of curiosity and if things don't work out and I have to ditch the flats, are the stock dish pistons for the 280Z 86mm also?

Yes, stock dished pistons are 86mm. Of course you should measure just to be sure the engine wasn't bored out prior to buying anything.

Absolutely. Thanks again.