i know there are some great engine builders here

[Eman]

Trust me Jenkins was my hero along with Smokey. I met both of them and are the few people I ever wanted an autograph of and got.
It's not so much the physics changing as the materials and availability of it changing. If you look at what they did they made everything themselves with the want to. They had only factory parts to work with and made their magic from there. The equipment you can buy today wasn't even available. Could you imagine the level they could or would have gone to with computers and CNC equipment?