hey guys If installed the new cam, lifters, Chain and sprocket. I followed the directions I was given step by step.I put the heads back on and installed the pushrods and rocker arms with both trunion upgrade and springs as well. I was working on doing the rocker arms but came across resistance while trying to turn the crank. It would spin a little then go back to the original spot. There’s also like a breathing sound. I do have the front cover off still. Did I miss anything? I don’t think I did as I followed the directions step by step.