Here's the deal, I tore down my engine tonight that I have been drag racing for two years. Time to go bigger, a 4 mil. Much to my suprise I didn't find a single clip on any of the crank bearings and this is puzzling me. I know hotrods have o-rings on inner bearings and that the tz bearing I bought from crank works is o-ringed for the clutch side. I have a maxload 11 ball installed on the stator side so no line up pin. My question is do I have to use a clip or can I just use o-rings all the way across. I would not have even questioned it had I not found my engine to have no clips. Do the cases clamp the bearings tight enough to hold them and that is why it worked in my old engine? I know nothing about the old engine, it was in the shee when I bought it. Any help would be very appreciated. If I have to have the clips does anyone have some they would sell me?