My dad built the motor and ported the heads. He is a retired mechanical engineer and has been building and racing mopars for 35 years. He spent alot of time on this build and one of the things he did was remove( knife edged counter weights) a bunch of weight off the forged scat crank (around 11 lbs). We run 4.30 gears in the dana with a 29.5-11.5 Phoenix tire. Plan on testing again in a couple weeks and I will keep ya posted.