I can't find a water pump that is specifically listed for my 1954-1955 261c.i. engine. I've read a lot of info on adapters for a post 1955 261c.i. being put into earlier car or truck. Is the water pump for the 235c.i. the same as the 261c.i. ? Does anyone know a brand and model pump that will work. I also need a 6 blade 18" fan that was stock for the 261. Help!!