If you heated the sprockets to get them on the cams, they would be darn near impossible to remove if you were ever inclined to do so. The likelihood of removing them is pretty remote, but removal would be difficult. If a sprocket ever did fail, the engine of course would stop. At the least, a towing bill could be in order. At the worst, an entire vacation ruined.
These are not a trivial task to install. Personally I wouldn't risk it.