Hey all I also am new to the 4BT conversion. I am in process of getting my 97 Jeep Wrangler imported (I live in Cancun, Mexico). I have the engine and trans. 98 Cummins 4BT Reman with a Muncie SM465. I plasti gauged the rod and Mains and they all were between .002" and .003" The bread van I drove it from Nashville, TN to Atlanta, Ga and it climbed Red top mountain at 65 mph bounce . I will update when the conversion starts.