Yedor, also in an MG Special, and novice driver, actor James Dean in a Porsche 356 Speedster. Miles was later disqualified on a technical infraction because his fenders were too wide, thus allowing Yedor and Dean to get 'bumped up' to first and second. During 1956, Miles raced John von Neumann's Porsche 550 Spyder at most of the Cal Club and SCCA events. For the 1957 season (in co-operation with Otto Zipper), Miles engineered the installation of a Porsche 550S engine and transmission in a 1956 Cooper chassis and body. It was the second successful race car to be known on the West Coast as "the Pooper", the first being an early 1950s Cooper chassis and body powered by a Porsche 356 power train that was built and campaigned by Pete Lovely of Tacoma, Washington. The resulting car dominated the F Modified class of SCCA on the west coast in the 1957 and 1958 seasons with Miles driving. Due to his great skill and talent, both as a driver and mechanical engineer, Miles was a significant member of the Shelby/Cobra race team in the early 1960s. Miles described himself this way: I am a mechanic. That has been the direction of my entire vocational life. Driving is a hobby, a relaxation for me, like golfing is to others. I should like to drive a Formula One machine, not for the grand prize, but just to see what it is like. I should think it would be jolly good fun! With a very pronounced Brummie accent (from his hometown of Birmingham, renowned for car manufacturing) combined with a seemingly obscure and sardonic sense of humour, he was affectionately known by his American racing crew as "Teddy Teabag" (for his tea drinking) or "Sidebite" (as he talked out of the side of his mouth). He played a major role in the development and success of the racing versions of the Shelby Cobra 289 in SCCA, USRRC and FIA sports car racing between 1962 and 1965 as well as the Daytona Coupe and 427 versions of the Cobra and the Ford GT (GT40). He became the chief test driver of Shelby-American in 1963. Miles had a "reputation for courtesy on the track" and was sometimes called the "Stirling Moss of the West Coast". While a member of the AC-Cobra Ford Team, Miles entered a Lotus 23 in the 1964 Player's 200 at Mosport.