Hey all. So I have a set of valve covers off a big block chevy and before I blast them and clean them I was trying to find a little info on the covers and a value. Can't find any info relating to these specific ones so I'm checking to see if anyone else might know. Numbers inside the cover are 14OR-48B. Only thing I see pop up are M/T and its not that and doesn't have the center breather. Thanks for any help.