The racecar that kicked-off Formula Ford... seems way overdue for a thread here.
So here's an article and a couple snapshots to get things rolling:
Dick Leehr's Lotus 51c, number 51C/FF/206, alt# AM217
(The article includes some historical notes, specifications, and 39 photos with captions to detail construction details and to differentiate the 51/51a/51b/51c model variants.)
