Trent- The speedometer will read about 10% faster than actual--the actual ratio being 3.91/3.64--presuming your initial differential gears were 3.64. You'll need to find a speedo from a 2002A, which used the 3.91 gears from the factory, or more likely have your own speedo rebuilt and recalibrated. Normally a $100 proposition. Peter coupeking