I like what I've heard about the 98" cylinders not having an iron liner...meaning the cylinders expand at a more even rate with the forged pistons for better seal...plus the aluminum will shed the heat quicker than the iron lining, making for a cooler running motor than a 95".
I've only got 20,000 miles on my 95" build, but when it starts feeling tired and needs a refreshening, I think I'll go with a Millenium 98 too. I was thinking of a 107, but why not save the money I'd spend on the case boring.
HDWrench... What do flat top pistons, with a .03" cometic gasket give you for compression? I run the Branch Flowmetrics #4 heads...sorry I don't have a cc volume to reference for you...but I know they mill off .05" and they fill and shaped the combustion chamber so I assume them to be fairly small. The website claims a 95" kit with flatops and .03" gasket makes for 9.8 to 1 compression. The reason I'm asking, is because I currently have domed JE pistons for 10.5 compression...which is what my cam is designed for. I'm hoping a flat top piston in 98" with thin gasket will atleast be 10.2 to 1