here is a tip for ayone fitting a panda 30 head,there are two engine case studs that come up in the intake throat of the panda head,you have to shorten them,but i came up with a wease.......take two bis studs and fit them to the aircooled block,they are the right length!.......... you can also nick some bis head acorn nuts to fit,smoother shape than a normal hex head:cool: