James Shirley has help to match up this image to the Crosley-Sparks car saying, "the addition of a new "unique" roll bar and two "racing" mirrors replacing the original single mirror changes its appearance slightly. Miller-Sparks article shows 3/4 front right side, rear, cockpit, & front suspension while 52H photo only shows 3/4 front left side. Nevertheless front hood section and tie down straps match, height of head fairing seems a match, rear body fender line appears to be the same and tail lamp in pic of 52H matches low left side only lamp in Sports Car Special magazine photos of Miller-Sparks car. Even steering wheel rim height above the cowl on 52H looks right for Miller-Sparks and 52H photo shows probable Crosley steering wheel spoke."
"Stockton, CA 1962
Fraser Sibbald was a lesser-known Monterey Peninsula driver. An older man in 1962, his racing history extended back to Pebble Beach and other early 1950s events. His car was a 750cc Crosley-powered Class H Modified."
Photo and quote from Tam's Old Race Car Site.