Are the heads the same? Just the heads themselves, no valvetrain or anything... I have the JDM engine in my car now and im going to rebuild my top end and i have a USDM H22 laying around and it would be much easier to just take off that head instead of my car sitting for a week while it was at the machine shop, but i just want to know so i can just swap the heads when everything is said and done.

 

yes it will be fine...as long as they are both prior to 98 it's cool

 

what is the difference when its after 98?