Welcome, I went through a 45 last year. I know I’ve got a push rod. I might have a rocker arm. I got head gaskets from Olson’s, intake and exhaust gaskets are really close to the copper seal ring used on Caterpillar oil drain plugs and fill plugs. (3T D7 final drive fill for example). For the upper water manifold gaskets, I used the rubber gaskets from a small banjo camlock fitting. The rest of the gaskets I made.