[RICK LAKE]

westcott cobra That 3550 will not last with an .68 5th gear and 2.88 rear dif gears. Even running under size tires. There are a few threads about this undr trannies. The motor with 400+ ft of torque is going to pound that trans which is ment for a 300+ ft of torque sb motor. 3.07 with the .87 gearing or 3.31 with the .68 will be min. This will also need a strong lowend motor with alot of torque to not lug the motor in the 1,70-1,900 rpm range. You are driving a flying brick, the faster you go the more resistance the car makes. You also need to be about 500 to 750 rpms inside the torque band of your motor for good drivibility. Rick L.