to me what has to be done is drastically cut cubic inches. back when the vw's came out they were 122cu.in. and they kicked a$$. clubs were formed to keep the vw's out. today the vw's are 165 cu in's and nobody wants one. by cutting the cu in's, and with today's technology more production based parts could be use instead of the purpose built parts in today's motor. if people wanted to have motors built by pink, gaerte, etc. great. if i could build a motor in my basement that may run just as good for less money i would be peeing in my pants. the main point is production parts instead of purpose built parts, that's where the big savings would be.
i know everyone would have to buy a new motor that's why it won't work. but all current motors would need is a crank and rods and away we go. i know to simple.