I am putting my engine back together after a rear cam bearing failure and need some pointers! I have been following this Forum and H-D Forum like deputy dog and thanks for all the good info and things I didn't know. Last night I got the new pistons and cylinders on(1550 flat top SE and cylinders off e-Bay). As luck would have it, I dropped a piston pin circlip in the crankcase--oops--while installing the rear cylinder. Took my rags out too soon! Got it back, though with my handy flex magnet. I sweated that one for a while. Im using Cometic MLS .030 head gaskets and need to be sure that I don't need the small O-rings on the location studs. The instructions say not to use them. Going with a 37 An:thanks: :thanks: :thanks: :thanks: :thanks: :thanks: :thanks: drews chain drive cam, new inner and cam bearings, tensioners, baisley spring, rear cam drive gear of course and bolt upgrade for outer sprockets. Will I need to change the cam suppport plate? I have noticed that the post 99 cam plates have an additional oil passage. I had good oil pressure and found no metal in the oil or case during tear down.