I am working on my seized 948 which promises to be a good engine. I've still not managed to free the pots but have been working on the cylinder head. I removed the valvegear to clean it up but had to abandon it because the rocker standards are seized solid, so I turned to my other spare engine 1098 low compression.
Although it looks as worn as the 948 one judging by the end rocker I removed from that, I persevered and cleaned it all up.
If it is noisy in operation I will look for new parts. I bet it didn't take long for them to wear like this either.