I'd definitely go with the Tarozzi rearsets from FastFromThePast. Well worth the money, and the customer service is SUPERB. And yes, the kickstart is unuseable because the brake lever is in the way. That's remedied by bending the lever, swapping out a different model's (forgot which one), or bringing a spanner with you to undo the bolt.
I'm sure you know, but the ones advertised for 71-76 CB500 will fit on the 74-76 CB550.