Swimmers did not use goggles in swim meets (not in Philly anyway) in 1974. They were used in practice. Googles in meets started later. Also swimmers did not use the style of start (grabbing the block and throwing your arms forward) in 1974. This also started much much later. I was a swimmer in Philly in the late 60's till about 1977.
When the PDR team goes to Main Line Academy for their first meet, their bus crosses the Benjamin Franklin Bridge, going into New Jersey. Both Philadelphia and the Main Line Academy are in Pennsylvania.