So what the heck is the difference between the Pre-2001 and the Post-2001 pistons in the Blandit motors? The pistons and cylinders have different pt#'s but everything else is the same (crank, rods, pins, cylinder head). Most of the aftermarket head gaskets and piston rings stop at 2000. Everything i see on the interweb has all Blandits at the same claimed capacity (1157cc) What gives? Higher compression pistons?