Google for "Namara formula"
yields:
http://www.f3historic.com/s_sales.php
MAC NAMARA FF/F3 "Poject" Original FF/F3 spaceframe new from old stock / some aluminium panels new /set of front and rear lower wishbones new / lower fiberglas body panel / set of all pedals / fuel tank / seat / front antirolbar / original Mac Namara drysumtank new / set formula ford wheels / Mac Namara radiator / set brake-clutch mastercylinder / steering column + bracket : 6500 Euros Delivery can be aranged.
http://www.allf1.info/history/indy.php
Pole Position
YearTimeKmhDriverCar/engine
1958 4'06.62 234.92 Dick Rathmann Watson/Offenhauser 4.5 L4 4255
Mac Namara Special
http://www.monoposto.nl/for_sale/mcnamara_ff1600.htm
ad with pictures
That was up through page 10. Any clues for you?