Old flashers on new cameras?

Hi, I am pretty new to film and just recently bought a Konica FT-1 new. I went on ebay and bought a flasher that works on FT-1 cameras called the Sunpak auto 422D and it works great. I then bought a new canon rebel K2 film camera, and was wondering if I could use that same flasher for my new canon? I have been too scared to mount the flasher and use it feeling it might fry my new canon. It does say on the flash "For all regular 35mm shoe mount cameras". But I have no idea what is a regular 35mm camera and what is not. If anyone knows or has tried old flashers on new cameras let me know. thanks.

You are right. All recent Canon cameras will withstand only about 6V input from the flash gun. Older speedlights put in excess of 200V on the cameras flash circuit as they were intended to be triggered by mechanical switches. Modern cameras are triggered by semiconductors and can't stand the volts.
However, B&H sell an adaptor which contains circuitry which can withstand high votages and slips onto your hotshoe and has a hotshoe on top. I have one and it works but it's not cheap.
First you need to find out if the Sunpak develops high voltages. A digital multimeter will answer that question.