What would they have done in 1973 to get that guitar sound? My daughter wants to sing this with me, and I can play it pretty well, but everything I've tried to get that tone just ends up sounding like a very cheesy special effect. I'm trying to dial it in on my Boss Katana mk2, which I've only had a few weeks. I've got closest by using, I guess this is obvious, overdrive/compression/delay/modulation (the "rotary" effect comes closest), but so far I've got nothing really usable. Also ideas what I could try? Just keep tweaking the basics or is there some huge thing I'm overlooking here?