no oil to rh rockers

I would think the engine should come out to remove cam shaft, there might be enough room if the rad etc is out, but like mailman abv said, if you assembled, you should always remember to chk and make sure the bearings are aligned properly. Also once bearings are in make sure to install cam temporarily to dbl check and make sure you can turn cam by hand. Not trying to beat you up...I have taken more steps backwards lately than forwards with dads 273 build...Let us know how it turns out.