[IMG][/IMG]I`m putting this here not sure where else to put it, I was given an old set of valve covers, the guy said they were sm blk chevy, well I new right away they were`nt but took them anyways, bigger that sm blk, not big enough for big block I was thinking Pontiac or Olds, they must be very early castings because they are really thick and heavy, Eldebrocks. size is 20.5 inches long, bolt pattern is 4.75 x 10.5, any body have any measurements handy..?