Sorry the pic is a screen capture of low-res home movie. Era is 1961-64. Location is unknown track in USA. Other cars identified in this race were a TR4 or TR4A, a TR2 modified for aerodynamics, and a Maserati Tipo 60 or 61.
Found it! Corvette-powered Devin Echidna, 1 of 3 built in 1958. One without head fairing, one with a hood bulge, and this one.