Originally Posted by Shmoo
81mm. Pick up a set of aftermarket pistons and rods for the buildup. Any reputable piston maker such as JE or Wiesco will have what you are looking for. Claying the motor for clearances is always a good idea when building up the compression ratio.
ah yes, then the b20 must be 84, i remember one of them at least being 84, eh, o well...i still say just use the money to buy a c5 or bore it out to the size of a b20...