I have a 99 cobra. I have recently rebuilt the motor, Twice, and both times I have spun the rod bearings. I built the first motor myself and use plenty of grease on the rod bearings. The second time the motor was built my Mcallister Brothers Racing and it too spun a rod bearing. I believe all the clearences were within spec for an aluminum motor. Has anyone had this problem and if so what can be done to prevent another spun rod bearing.