Getting ready to finish the reassembly of the 650 engine that had come with a 'stalled restoration' project. The bores have redone 10 over, NOS pistons and rings, new Amal carbs. I have not unpacked the lower part as it is packed with oily rags and I dot not want to disturb that until it is in the shop I am reassembling it (maybe I should before). My question is, I am planning on getting new bolts etc. The 'kit' is also missing the pushrods so I need to source those as well. Someone had mentioned two piece studs to make reassembly with rocker covers easier. First motorcycle engine rebuild for me. What should I look for/buy so that they will fit this engine?