My guess that your rigger is in the BVI right about now. Riggers aren't usually in the business of stepping the mast on daysailers so if one does respond, be prepared to spend more than a couple hundred dollars. They ain't cheap. You probably don't need him as you most likely possess all the skills to rig, you just need confidence.
I did a very quick search on the internet and there is plenty of information out there for your boat including brochures and what passes for an owner's manual (these were very basic documents back in the seventies - I used to own a seventies vintage Catalina). Really simple, looks to me to have external halyards. Rig them before stepping the mast. Main stb side, jib port is the usual configuration. Step the mast while the boat is on the trailer - not in the water. Attach backstay and [side] shrouds to boat. Move mast base aft from the pulpit so it is over the mast step. Starting from the stern lift up the mast and walk forward, pivoting the mast in the step. Either walk the headstay forward or have your assistant attach the headstay. Adjust all shrouds so the mast is plumb from side to side and has a slight rake aft. Tighten them so there isn't any play in the shroud and they all "feel" about the same tightness. When satisfied, mark the turnbuckle screws with tape so it will be faster the next time. Rig the boom, mainsheet and bend on the main. Launch the boat. Rig the jib and it's sheets. Raise sail, sail away.
If you are still unsure, I'd be happy to help you for free - Just pay for my airfare from San Francisco. Or if you want the cheaper solution, take a bunch of photos of the stuff you are unsure of and we'll work it out over the internet.
