That idea is nothing new, Schram made tractors where half the cylinders made power,the other half compressed air. The oldest I have seen was made in the 40's ,no doubt there are plenty others around even older. I worked as a mechanic for DOT up until I retired last year ,and I never saw any 351 ford powered compressors in any configuration,and all that I saw come in the door since 1980 were diesels. Hank