best deal on goodyear air hose check this out https://amzn.to/3b5cJvy All these things i suggest have been tested with gauges back in the 80s at my buddys shop. The only thing I left out is Cool tin which is type 3 replica tin for all vw engines. It goes under the cylinders. has metered holes. Really works well it is on the other modified engine video. you might want to watch it as well.