Gosh, 1974!!? Thems were the good ol' days...
Expose the film just for fun. In this age of lomography, Instagram and wierd and wonderful colour shifts and better still, the atmospheric images produced through primitive pinhole cameras (see Worldwide Pinhole Photography Day galleries!) there is no harm in taking a trip down memory lane, even if by 40-odd years as an adventurous experiment. There was no Photoshop or Lightroom in 1974 and 1975; anything like mottling or deteriorated emulsion could be patched up after a scan, or even left 'as is'. Just don't trust any of this stuff to a wedding. Have fun!