I just replaced the seals in that block on one of my cars last week. Not hard to do, but at the end you need to center the block so that the steering wheel doesn't kick or turn by itself when started as mentioned above. I was able to find the O rings at my local Autozone store, which had an assortment of them for sale in a small kit - worked like a charm. I might mention that one of the O rings in my block was completely deteriorated and gone. I was surprised it didn't leak more than it did.