No problem, If you think you will ever need to go to Canada since your record goes back over 30 years ago, you can apply for rehabilitation with the Canadian Border Services. This can be done by mail through a Canadian embassy, or you can actually submit it at a land border crossing (they can process it in a few weeks rather than a few months like the embassy). It costs $200 Canadian (about $150 USD) to apply, along with their requested docs. Once you are granted it, it is good forever so you can enter Canada freely after that. It's a money grab no doubt, and in my opinion Canada is over zealous in this regard, Canada could seriously devote these resources elsewhere (like gun smugglers for example). However, you should have few issues visiting other countries (tourist) as your passport will not show your criminal record like it would for Canadian border officials, but it is always good to do a bit of research before you book a flight. Best wishes.