As long as the rams get a long enough acclimation period before being added to your tank (you might want to drip acclimate them for about an hour), they'll be okay. If you want to be really careful with them, get a small 10 gallon with a sponge filter and quarantine them for a few weeks. Rams are prone to gill flukes and it would be much easier to treat them in a bare quarantine tank than it would your planted aquarium. During that quarantine time, you could also transition them more slowly into your tank water.
I see absolutely no problem with rams in those parameters... I've kept them in water with a slightly higher KH and they were breeding, even. Of course, the eggs didn't hatch, but they grew well, had excellent color, and were active eaters. Those fish probably haven't seen super soft water in several generations and their bodies are probably more used to a normal tapwater now, anyway. Most fish common in the hobby are so removed from their native habitat that they can handle parameters outside of the "perfect" range as long as they're kept clean and fed well.
I see absolutely no problem with rams in those parameters... I've kept them in water with a slightly higher KH and they were breeding, even. Of course, the eggs didn't hatch, but they grew well, had excellent color, and were active eaters. Those fish probably haven't seen super soft water in several generations and their bodies are probably more used to a normal tapwater now, anyway. Most fish common in the hobby are so removed from their native habitat that they can handle parameters outside of the "perfect" range as long as they're kept clean and fed well.
