My Ex wife has An IQ in the 140 region but my Dog has more common sense and abilty to think out problems. She's the most intelligent dumby I know.. .

Mark sounds like Bretts designed the engine already but no idea how to turn it into reality.?

Brett in designing the engine you have done possibly less than 20% of the process towards a succesful engine. The hard and skillfull part starts now and no matter how intelligent if you havent got the skills to machine to high tolerences or the experience to R&D designs then your in for a long and expensive journey with high potential for disapointment.!!

My advice would be take the time to develope the engineering skills, maybe take some class's along side self development gaining hands on experience using own machines.
High IQ along with library full of books giving all Theory in the world can't compare to time served on machines.

I don't think for one minute you won't succed but I do know it will be far longer journey than you possibly realise before you have the skills to build a succeful reliable working engine.!!

Good luck.!