I have always had good intentions to put them in and somehow have always left them on the bench, never had any problems. When I built the stroked 4.0 for my Jeep I did the same thing. I cleaned the oil slinger and put it in line to be installed, ended up on the bench just like my small block ones always have LOL. Its got 50K miles on over 11 years, I think its going to be OK.