So Matt,

Using the RS pistons that are taller means that they need to be matched to a cylinder to allow proper deck height.

What is the difference in height? Would a fat base gasket help? What about a VHM head with a custom insert?

What is the deck height to look for on this setup?

Also, what is the real reason to do this? You go from two rings to one ring meaning wear and tear will happen quicker, meaning more top ends sooner. What would the difference in compression be? Is the port timing still going to be the same? I know the sides of the RS piston have indents, while the NSR is all smooth. What do these indents do for port timing?

thanks
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Charles Gallant