I went to a model show yesterday in York,PA. (cabin fever expo) I was amazed at some of the gas and steam engines I seen. Some guy built over a 10 year period a 392 hemi engine, another guy a Offenhauser, still another guy had a inline 6 duel overhead cam with 3 webber side draft carbs. It was hooked to a dyno and putting out 5.2HP. These engines have about a 1 inch bore. There were steam engines the size of your fingernail. I had 4 full hours of enjoyment and will go again next year. P.S. When I drove by the Harley Davidson plant I didn't see too many cars in the parking lot.