Alan Mann racing engineers crafted a lightweight GT 40, the Hemi Honker, and Chitty Chitty Bang Bang. That's expertise regardless of what the car is for

however, Andretti hated it, called it the worst car he'd ever raced, get the story at http://justacarguy.blogspot.com/2017/01/the-holman-moody-honker-tested-by.html of how many people worked on it between Alan Mann racing, and when Andretti got in it

http://www.alanmann.co.uk/our-story/

http://www.theroaringseason.com/showthread.php?1113-Article-Ford-Falcon-Sprint&s=d42e77ace7ee7c9f91bbd202b83cfe74&p=28222&viewfull=1#post28222