Looks like pic is from 1973 Speedweeks. First race attempt for DiGard. Donnie lost an engine in his twin and DNQ for the 500. The team moved on and made their first start at Richmond. DiGard's 2nd start was at Bristol in the Southeastern 500.
See pics of Bristol car here:
Found this pic on ebay of the DiGard team tweaking Donnie's #59 that Bristol weekend.
March 25, 1973 Southeastern 500. Cale and Junior putting a whuppin' on 'em that day. #11 led all 500 laps.
1973 Southeastern 500. Second career start for DiGard. Team didn't race at Riverside. DNQ for Daytona 500. Made first start at Richmond with Donnie. Bristol was second start for the team. Qualified 8th, finished 24th.
Ray Lamm has pic of the new 59 team at Daytona here: